Giáo án Tiếng Anh Lớp 7 - Tiết 64 đến 87 - Năm học 2019-2020 - Trường THCS Mường Kim

Period 65. PRACTICE

I. OBJECTIVES

1. Knowledge:

By the end of the lesson, students will be able to do exercises related to unit 10.

2. Skills: Using 4 skills: speaking, listening, reading, writing.

3. Attitudes: Ss have great passion for studying

II. PREPARATION:

1. Teacher's: text book, teacher’s book, speaker.

2. Students': text book, note book, pens

III. METHODS, TECHNIQUES:

1. Methods: Communicative approach, group Ss and T’s activities, teaching methods

with game, teaching methods by visual, teaching methods by practising, discussion

group, .

2. Techniques: groupwork, pair work, individual work

IV. PROCEDURES:

1. Organization:

Greetings and checking student’s attendance.

2. Checking the old lesson: omit

3. New lesson:

Activity 1: Warm - up: omit

Acticvity 2: Acquire new skill and knowledge

Review grammar:

- Past simple tense

- why -> because

Activity 3: Practice

Ex 1: Chia động từ trong ngoặc ở quá khứ đơn.

Yesterday (be). Sunday, Nam (get). up at six. He (do). his

morning exercises. He (take). a shower, (comb). his hair, and then he

(have). breakfast with his parents.

Nam (eat). a bowl of noodles and (drink). a glass of milk for his

breakfast. After breakfast, he (help). Mom clean the table. After that, he

(brush). his teeth, (put). on clean clothes, and (go). to his

grandparents' house. He (have). lunch with his grandparents. He (return).

to his house at three o'clock. He (do). his homework. He (eat). dinner at

6.30. After dinner, his parents (take). him to the movie theater. It (be). a

very interesting film. They (come). back home at 9.30. Nam (go). to bed at

ten o'clock.

1. What day was yesterday?

2. What time did Nam get up?

3. What did he do after breakfast?

4. Who did he have lunch with?5. What time did he have dinner?

6. What time did Nam go to bed?

pdf46 trang | Chia sẻ: Chiến Thắng | Ngày: 27/04/2023 | Lượt xem: 135 | Lượt tải: 0download
Bạn đang xem trước 20 trang mẫu tài liệu Giáo án Tiếng Anh Lớp 7 - Tiết 64 đến 87 - Năm học 2019-2020 - Trường THCS Mường Kim, để tải tài liệu gốc về máy bạn click vào nút DOWNLOAD ở trên
Preparing date: 3/5/2020 Teaching date : 7A (5/5) UNIT 10: HEALTH AND HYGIENE Period 64: B. A bad toothache (B3) I. OBJECTIVES 1. Knowledge: - By the end of the lesson ss will be able to: + Learn the new words and the past forms of the verbs by heart. + Read and answer the questions, summarize the text. 2. Skills: Using 4 skills: speaking, listening, reading, writing. 3. Attitudes: Ss have great passion for studying II. PREPARATION: 1. Teacher's: text book, teacher’s book, speaker. 2. Students': text book, note book, pens III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, group Ss and T’s activities, teaching methods with game, teaching methods by visual, teaching methods by practising, discussion group,. 2. Techniques: groupwork, pair work, individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: Write new words 3. New lesson: Activity 1: Warm - up: - Ask Ss to play the game : Hang man You must go to the .... to check your teeth _ _ _ _ _ _ _ * Key : dentist Acticvity 2: Acquire new skill and knowledge - Ask Ss to look at the text in the picture B3 in the book and ask What are they doing? - Present the situation: Minh is at the dentist and Dr Lai is checking his teeth. - Present new word: surgery, smile , advice. - Present the new structures => Try not to forget, brushing teeth is very important. Minh’s tooth hurts. Why? Why does Minh’ s tooth hurt? Because he has a cavity Activity 3: Practice - Ask Ss to read the text silently. - Call some Ss to perform reading. - Give words and ask Ss to read the text again and choose the word to fill in the gap: smiles, pleased, cavity, nervous, brush - Ask Ss to give out their answers on the board. * Key: a. nervous b. Smiles c. cavity d. brush e. pleased Activity 4: Exercise Chia động từ ở quá khứ đơn: Ss work individually. 1. I ____________ at home all weekend. (stay) 2. Angela ___________ to the cinema last night. (go) 3. My vacation in Hue ___________ wonderful. (be) 4. Last summer I __________ Ngoc Son Temple. (visit) 5. I ___________ a lot of gifts for my little sister. (buy) 6. Lan and Mai __________ sharks, dolphins and turtles at Tri Nguyen aquarium. (see) 7. Trung __________ chicken and rice for dinner. (eat) 8. Phuong ____________ to Hanoi yesterday. (return) 9. Yesterday, I (go)_____________________ to the restaurant with a client. 10. My client and I slowly (walk) _____ back to the car. Activity 5: Enrich ideas development Xếp các động từ sau theo cách phát âm của tận cùng "ed". (at home) listened wrapped painted raised looked needed visited rained watched opened helped seemed learned practiced stopped remembered worked rented arrived talked lived liked invited received washed V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Learn the new words by heart. - Do exercises in the workbook - Prepare for the next lesson: Practice. Preparing date: 5/5/2020 Teaching date: 7A Period 65. PRACTICE I. OBJECTIVES 1. Knowledge: By the end of the lesson, students will be able to do exercises related to unit 10. 2. Skills: Using 4 skills: speaking, listening, reading, writing. 3. Attitudes: Ss have great passion for studying II. PREPARATION: 1. Teacher's: text book, teacher’s book, speaker. 2. Students': text book, note book, pens III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, group Ss and T’s activities, teaching methods with game, teaching methods by visual, teaching methods by practising, discussion group,. 2. Techniques: groupwork, pair work, individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: omit 3. New lesson: Activity 1: Warm - up: omit Acticvity 2: Acquire new skill and knowledge Review grammar: - Past simple tense - why -> because Activity 3: Practice Ex 1: Chia động từ trong ngoặc ở quá khứ đơn. Yesterday (be)............ Sunday, Nam (get)............ up at six. He (do)............ his morning exercises. He (take)............ a shower, (comb)............ his hair, and then he (have)............... breakfast with his parents. Nam (eat)............... a bowl of noodles and (drink)............ a glass of milk for his breakfast. After breakfast, he (help)............... Mom clean the table. After that, he (brush)............ his teeth, (put)............ on clean clothes, and (go)............ to his grandparents' house. He (have)............... lunch with his grandparents. He (return)............ to his house at three o'clock. He (do)............ his homework. He (eat)............... dinner at 6.30. After dinner, his parents (take)............ him to the movie theater. It (be)............ a very interesting film. They (come)............ back home at 9.30. Nam (go)............ to bed at ten o'clock. 1. What day was yesterday? 2. What time did Nam get up? 3. What did he do after breakfast? 4. Who did he have lunch with? 5. What time did he have dinner? 6. What time did Nam go to bed? Activity 4: Exercise Ex 2. Điền giới từ vào chỗ trống: 1. My mother takes care ............... the family. 2. I smiled ............... the child and said "Hello". 3. She is always worried ............... her children. 4. Milk is good ............... your health. 5. Most children are scared ............... seeing the dentist. 6. The dentist looked ............... my teeth. Activity 5: Enrich ideas development Ex 3. Hỏi câu hỏi với Why và trả lời với Because: 1. he/ be scared?// hate the sound of the drill .............................................................................................. 2. children/ often have toothache?// eat lots of candy .............................................................................................. 3. you/ be late for class yesterday?// miss the first bus .............................................................................................. 4. her tooth/ hurt?// have a cavity .............................................................................................. 5. they/ not come to the meeting last night?// be busy .............................................................................................. 6. she/ go to the doctor?// have a headache .............................................................................................. 7. Minh/ not say anything/ yesterday?// be very nervous .............................................................................................. 8. we/ brush our teeth after meals?// want to have healthy teeth. .............................................................................................. V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Learn grammar by heart. - Prepare: Unit 11. A1 Preparing date: Teaching date: UNIT 11: KEEP FIT, STAY HEALTHY Period 66. A check - up (A1) I. OBJECTIVES 1. Knowledge: By the end of the lesson, ss will be able to: + Know what are checked when having a medical check-up + Remember the language that the nurse uses when she asks them to do while having a medical check-up 2. Skills: Using 4 skills: speaking, listening, reading, writing. 3. Attitudes: Ss have great passion for studying II. PREPARATION: 1. Teacher's: text book, teacher’s book, speaker. 2. Students': text book, note book, pens III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, group Ss and T’s activities, teaching methods with game, teaching methods by visual, teaching methods by practising, discussion group,. 2. Techniques: groupwork, pair work, individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: omit 3. New lesson: Activity 1: Warm - up: - Ask Ss some questions such as : + Do you eat much candy ? + Do you often eat ice- creams? + How often do you brush your teeth ? + If you have healthy teeth , what should you do ? - Remark and lead in new lesson . Acticvity 2: Acquire new skill and knowledge - Ask ss to look at picture A1 in the book and ask: + Who is this? + What are they doing? + Who is going to have a medical check-up now? - Present the situation: This is Hoa she is having a medical check-up now. She is following the nurse’s instructions - Present the new words + Medical check- up ( n ) : Khám sức khỏe (trans) + Medical record ( n ) : Phiếu khám sk (trans ) + Height ( n ) : Chiều cao (trans) + To measure ( v ) : Đo ( trans) + To weigh ( v ) : Cân nặng ( trans) + Temperature ( n ) :nhiệt độ, Sốt. (trans) + To take one’s temperature : Đo nhiệt độ của ai + Scales ( n ) : Cái cân ( explain ) + Normal ( adj ) : Bình thường (trans) + Note: C= Celsius (tên của nhà phát minh ra nhiệt kế) or Centigrade : bách phân Activity 3: Practice - T opens the tape 2 times - Ask Ss to practice the dialogue in exchange pairs - Present the new structures Eg: I need to take your temperature I need to + V ... Eg: Would you open your mouth, please? Would you + V...? Activity 4: Exercise - T lets Ss work in pairs to ask and answer the question about height, weight, temperature a. What’s your weight?/ How much do you weigh?/ How heavy are you? b. How tall are you? c. What’s your temperature? - Ask Ss to work in pairs to number the sentences 1. f 2. d 3. c 4. g 5. e 6. a 7. h 8. b Activity 5: Enrich ideas development - Ask 2 Ss to play the roles to act the dialogue again before the class V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Learn the new words by heart. - Do exercises in the workbook - Prepare for the next lesson: Unit 11: B1 Preparing date: Teaching date : UNIT 11: KEEP FIT, STAY HEALTHY Period 67: What was wrong with you? (B1) I. OBJECTIVES 1. Knowledge: - By the end of the lesson ss will be able to + Ask and answer about health + Know some more neew words + Listen, read fluently part B1 understand the dialogue and answer the questions + Make similar dialogues to ask and answer about their friends’ health 2. Skills: Using 4 skills: speaking, listening, reading, writing. 3. Attitudes: Ss have great passion for studying II. PREPARATION: 1. Teacher's: text book, teacher’s book, speaker. 2. Students': text book, note book, pens III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, group Ss and T’s activities, teaching methods with game, teaching methods by visual, teaching methods by practising, discussion group,. 2. Techniques: groupwork, pair work, individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: KIỂM TRA 15 PHÚT Question I: (5 Marks) Supply the correct tense for the verbs in brackets. (Cho dạng đúng của các động từ trong ngoặc) 1. Hoa (visit)..Hue twice a year. 2. He (arrive)...Hue yesterday. 3. She (be).born in Than Uyen in 2004. 4. They (return)Hanoi tomorrow. 5. Listen! I think the telephone ....................(ring) Question II: (5Marks) Write the past form of the verbs. ( Viết các động từ sau sang dạng quá khứ) Stt Infinitive Past form 1 be 2 do 3 give 4 get 5 change 3. New lesson: Activity 1: Warm - up: omit Acticvity 2: Acquire new skill and knowledge - Ask Ss to look at the dialogue B1 in the book and present : This is Lan. She is talking to her teacher about why was absent yesterday. - Present the picture and the new words + sick = ill (adj) + write a sick note (v) + have a bad cold (v) Pictures + have a headache (v) + have a virus (v) - Present the new structures to ask and answer about health at the moment and in the past - What is wrong with you? + I have a headache + What was wrong with you? + I had a headache Activity 3: Practice - T opens the tapes 2 times and Ask ss to practice the dialogue in exchange pairs - T gives extra board and explain require of the exercise - Ss play lucky number Answer a) Because she had a bad cold b) She had a headache c) He tells her to stay inside at recess d) The doctor said that she had a virus e) The doctor wrote Lan’s sick note Activity 4: Exercise - T gives exercise by extraboard Activity 5: Enrich ideas development - Write past form of these verbs - write – wrote - be – was / were - say – said - have - had V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Learn the new words and make 5 examples about the structures in the book - Do exercies in the workbook - Prepare for the next lesson: 45 minutes test Preparing date: Teaching date: Period 68: KIỂM TRA 1 TIẾT I. OBJECTIVES: 1. Knowledge: To review for ss about the grammar they have learnt from unit 12 to unit 14. 2. Skills: Reading, listening, speaking, writing skills. 3. Attitudes: - Positive about their lesson. - Students know how to learn English in right way. - Ss are interested in doing exercises. 4. Ability orientation: a. Common abilities: - Self - control and self-study capacities. - Communication and cooperation capacities. - Problem solving and creativity capacities. b. Specific abilities: - English language ability. II. PREPARATION: 1. Teacher's: test paper 2. Students': test paper III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, 2. Techniques: individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: write new words. 3. New lesson: Activity 1: Warm – up : Omit Acticvity 2: Acquire new skill and knowledge: Omit Acticvity 3: Practice 45 MINUTES TEST Acticvity 4: Exercise: Omit Activity 5: Enrich ideas development: Omit V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Prepare for the next lesson: Unit 12: A1 Preparing date: Teaching date: UNIT 12: LET’S EAT Period 69: What shall we eat? (A1) I. OBJECTIVES 1. Knowledge: By the end of the lesson , Ss will be able to understand the details and practice food vocabulary. Use the structures : I don’t like ..either , I like too / neither do I, So do I to express references . 2. Skills: Using 4 skills: speaking, listening, reading, writing. 3. Attitudes: Ss have great passion for studying II. PREPARATION: 1. Teacher's: text book, teacher’s book, speaker. 2. Students': text book, note book, pens III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, group Ss and T’s activities, teaching methods with game, teaching methods by visual, teaching methods by practising, discussion group,. 2. Techniques: groupwork, pair work, individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: omit 3. New lesson: Activity 1: Warm - up: omit - Have Ss play a game : Kim’s game . ( Use the pictures or words written on the board of : fish , chicken , beef , milk , bananas, apples , carrots , oranges ) - Call the students to go to the board and write again . - Remark and lead in the new lesson . Acticvity 2: Acquire new skill and knowledge - Introduce the situation of the lesson to Ss and ask Ss to guess what Hoa and her aunt bought at the market . - Have Ss look at the pictures - Explain some new words and structures to Ss . Structures : + I like spinach and cucumbers .  So do I / I do , too. + I don’t like pork .  Neither do I ./ I don’t , either . Activity 3: Practice - Ask Ss to read the dialogues in pairs . - Call on some pairs to practice reading in front of the class . - Correct their pronunciation . - Give some pictures or given words to Ss to practice . + Carrots . X + Beef V + Papaya V + Cabbage X + Fish X + Chicken V Activity 4: Exercise - Have Ss work in pairs using the structures they have just learnt and given words. - Call on some pairs to practice in front of the class . - Remark . Activity 5: Enrich ideas development: - Retell the content of the lesson. V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Learn by heart new words - Do exercises in workbook - Prepare for the period 70. Unit 12. B1-2 Preparing date: Teaching date: UNIT 12: LET’S EAT Period 70: B. Our food (B1-2) I. OBJECTIVES 1. Knowledge: By the end of the lesson , Ss will be able to know the reason Nam has to see a doctor. Keep fit and stay healthy. 2. Skills: Using 4 skills: speaking, listening, reading, writing. 3. Attitudes: Ss have great passion for studying II. PREPARATION: 1. Teacher's: text book, teacher’s book, speaker. 2. Students': text book, note book, pens III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, group Ss and T’s activities, teaching methods with game, teaching methods by visual, teaching methods by practising, discussion group,. 2. Techniques: groupwork, pair work, individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: Call Ss to write new words 3. New lesson: Activity 1: Warm - up: omit - Ask Ss some questions : Do you like chicken?/ Beef ? Do you know how to prepare a meal? Acticvity 2: Acquire new skill and knowledge - Ask Ss to look at the picture and answer the question : Where is Ba ? What is the matter with him ? - Teach vocab: + terrible (a) + dirt (n) / dirty (a) + stomachache (n) + care (n)/careful (a)/carefully(adv) - Call on some Ss to give their predictions . Activity 3: Practice - Ask Ss to look at the book , listen to the tape and check their prediction. - Call on some Ss to give the correct answers . + Ba is at the doctor’s . + He has an awful stomachache . - Explain some structures to Ss . + It must be something you ate . + It was probably the spinach . + That dirt can make you sick . + These medicine will make you feel better. - Have Ss make sentences with the structures . - Have Ss read the dialogue in pairs . - Call on some pairs to practice in front of the class . - Correct their pronunciation . - Set the scence: food play an impostant past in our life It gwes us the main energy for body development. A balanced diet is especially impostan. In our today is lesson, weare going to learn about the definition of a balanced diet and usgul go delines about food. - What is your favorite food ? - What do you always have for break fast/ lunch/ dinner/? - Do you think your diet is balanced? - Teach vocab: amount of, diet, balanced, moderate, energy, effect, lifestyle, dairy product. - T reads the text. - T asks ss to read the text silently - Then ss read the text again and do T/F exercise: 1. We should eat a lot of sugar. 2. We should eat plenty of vegetables. 3. We should not do exercise. 4. Don't eat too much fatty food. 5. We should eat some meat and dairy products. - T calls some sts to give the answers - T corects. Activity 4: Exercise • Now complete the story . - Ask Ss to complete the story based on the dialogue above and the given words: 1. asked 2. make 3. wash 4. the 5. had 6. doctor 7. medicine 8. carefully 9. the doctor 10. spinach 11. vegetables 12. sick - Have Ss exchange the result with the partner . - Call on some Ss to give the result in front of the class . - Correct and give answer key : Ba went to the doctor because he was sick. The doctor asked Ba some questions . Ba said he had some spinach last night . The doctor said he must wash the spinach more carefully/well. Vegetables can be dirty . The dirt can make people sick . She / the doctor gave Ba some medicine to make him feel better . Activity 5: Enrich ideas development: - Call on some Ss to read the story in front of the class . V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Learn by heart new words - Do exercises in workbook - Prepare: Preparing date: Teaching date: Period 71. 45 MINUTES TEST CORRECTION I. OBJECTIVES: 1. Knowledge: To review for ss about the written test. To make ss more aware of learning English. 2. Skills: Reading, listening, speaking, writing skills. 3. Attitudes: - Positive about their lesson. - Students know how to learn English in right way. - Ss are interested in doing exercises. 4. Ability orientation: a. Common abilities: - Self - control and self-study capacities. - Communication and cooperation capacities. - Problem solving and creativity capacities. b. Specific abilities: - English language ability. II. PREPARATION: 1. Teacher's: test paper 2. Students': test paper, notebook, pen III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, 2. Techniques: individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: write new words. 3. New lesson: Activity 1: Warm – up : Omit Acticvity 2: Acquire new skill and knowledge: Omit Acticvity 3: Practice - T. gives back ss’ the test and checks their answers sentence by sentence. - T asks ss to give correct answer for each question and asks ss a reason for their choce. - T explains for ss about each question and writes correct answers on board. * Answer keys: - Collect all testing papers. - Give some remarks. Acticvity 4: Exercise: Omit Activity 5: Enrich ideas development: Omit V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Prepare period 72. Language focus 4 Preparing date: Teaching date: Period 72. LANGUAGE FOCUS 4 I. OBJECTIVES 1. Knowledge: By the end of the lesson , Ss will be able to do exercises in order to practice the structures which have been learnt , they will use them and apply to do exercises well 2. Skills: Using 4 skills: speaking, listening, reading, writing. 3. Attitudes: Ss have great passion for studying II. PREPARATION: 1. Teacher's: text book, teacher’s book, speaker. 2. Students': text book, note book, pens III. METHODS, TECHNIQUES: 1. Methods: Communicative approach, group Ss and T’s activities, teaching methods with game, teaching methods by visual, teaching methods by practising, discussion group,. 2. Techniques: groupwork, pair work, individual work IV. PROCEDURES: 1. Organization: Greetings and checking student’s attendance. 2. Checking the old lesson: omit 3. New lesson: Activity 1: Warm - up: - Ask Ss some questions such as : + What did you do yesterday ? + Did you watch TV last night ? + What did you do during last summer vacation ? Acticvity 2: Acquire new skill and knowledge - REMIND GRAMMAR: - The simple past tense . - Indefinite quantifiers : A little / a lot of / lots of / too much . - Too / either / neither / so . - Imperatives . Activity 3: Practice - Ask Ss to look at the pictures in the book and answer what they are doing . - Call on some Ss to answer the questions in front of the class . a) Watch TV . b) Eat at a restaurant . c) Go to the movie theatre . d) Read books . e) Play soccer . - Have Ss answer the questions , using the pictures . - Make example : S1: Did you do your homework last night ? S2: No, I didn’t . I watched TV . - Have Ss work in pairs asking and answering the questions . - Call on some pairs to practice in front of the class . - Correct and give the correct answers . - Ask Ss to write in the notebooks . Activity 4: Exercise Indefinite quantifiers : - Have Ss repeat the indefinite quantifiers and the use . - Ask them to do exercise 2 . • Write the correct expression . - Ask Ss to write the correct expression , using the pictures . - Call on some Ss to give the answers in front of the class . - Correct and give the correct answers : + A little coffee . + A lot of salt . + A lot of tea . + Too much water . + A little sugar - Ask Ss to write in the notebooks . c. Too and either / So and neither . - Ask Ss to repeat the use of too/ so / either and neither . - Have Ss practice the dialogues in pairs . - Call on some pairs to practice in front the class . - Have Ss play a game : Noughts and Crosses . - Remark and ask Ss to write sentences in the notebooks. EX: S1: I like mangoes . S2: So do I / I do , too . S1: I don’t like bananas . S2 : I don’t , either / Neither do I . Activity 5: Enrich ideas development: - Retell the content of the lesson. V. INSTRUCTION FOR THE NEXT LESSON PREPARATION - Learn by heart new words - Do exercises in workbook - Prepare for the period 73. Unit 13. Activities A1,3 Preparing date: Teaching date: UNIT 13. ACTIVITIES Period 73. Sports (A1 + 3) I. OBJECTIVES 1. Knowledg

File đính kèm:

  • pdfgiao_an_tieng_anh_lop_7_tiet_64_den_87_nam_hoc_2019_2020_tru.pdf