1. 牛津版 七年级 (7B) Unit 6

2. Grammar B Using ‘should’ and ‘must’ Grammar B Using ‘should’ and ‘must’

3. How to look after your pet? Keep it clean. Brush its fur. Don’t give her a shower. Don’t pull its ears. You should keep it clean. You should brush its fur. You shouldn’t give her a shower. You shouldn’t pull its ears.

4. How to look after your pet? Give it clean water. Change the water once a week. Don’t give it too much food. Don’t hold it in your hand. Don’t put it in the sun. You should give it clean water. You should change the water once a week. You shouldn’t give it too much food. You shouldn’t hold it in hand. You shouldn’t put it in the sun.

5. Read the following situations and think about what you’ll say to them, using ‘should’ and ‘shouldn’t’. A. Simon was late for school this morning because he got up late. You should go to bed early. You should get up early. You should…. You shouldn’t be late again.

6. B. On your way home, you saw a purse on the ground. You should give it to the police. You should wait for the owner. You shouldn’t take it home.

7. We use ‘should’ and ‘should not’ to give advice and to tell people what is the best or right thing to do. 1.You ______ do your homework carefully. Fill in the blanks: should Summary

8. 2. You ______ give seats to the old people on the bus. 3. You ________ speak to the old people loudly. 4. You ________ sit on the table. It isn’t polite. should shouldn’t

9. Do some exercises: shouldn’t should 改同义句 1. It is bad for your eyes to read in the sun. You _________ read in the sun. 2. It is good for your health to exercise for half an hour a day. You ______do exercise half an hour a day.

10. 1. 当别人需要帮助时, 我们应当帮助他 们。 2. 你不应该花很多时间玩电脑游戏。 We should help people when they need help. You shouldn’t spend too much time playing computer games. 翻译

11. If you are reading in a library, what must you do and mustn’t you do? keep quiet keep the books clean I must (do) Discussion

12. speak loudly make a lot of noise take any food to the library throw rubbish take any books or magazines out of a library I mustn’t (do)

13. Is it necessary for us to wear sunglasses? Yes, you must wear them.

14. Is it important to walk the dog every day? Is it important to take the dog to the park? Yes, you must walk it every day. No, You mustn’t take the dog to the park.

15. We use ‘must’ and ‘must not’ to tell people that it is necessary or very important to do or not to do something. We use “mustn’t” to tell people that it is necessary or very important not to do something. Summary

16. 1. You ____ put on your coat, it’s cold. 2. You ____ do your homework first. 3. You ________ spend too much time watching TV. 4. You _______ play with fire. Fill in the blanks: must mustn’t

17. Do some exercises 1. Don’t touch the dog’s nose. You _______ touch the dog’s nose. 2. It’s not necessary to feed goldfish too much. You _______ feed goldfish too much. mustn’t 改同义句

18. 1. 我们必须努力学习。 We must study hard. 2. 你必须把它还给我。 You must give it back to me. 3. 他们不可以从房间里拿走任何一本书。 They mustn’t take any book out of the room. Translate sentences

19. 4. 我必须每天下午给我的鹦鹉喂食吗 ? Must I feed my parrot every afternoon? No, you needn’t.

20. Differences between ‘should’ and ‘must’ ‘must’ 比 ‘should’ 语气更强烈， 而 mustn’t 表示禁止做某事或不允许做某事 1. You _______ bring your pet to school. 2. They ______ come earlier next time. 3. You ____ keep quiet in the library. 4. We ________ spend too much time watching TV. mustn’t should must shouldn’t

21. Finish the sentences in part B1

22. / Dogs like lots of exercise. You ____ walk them in the park once a day if you want them to be healthy. If you don’t have enough time, you _________ get one. should not must

23. Fish are good pets, but you _____ give them clean water. You ________ give them too much food. If you have a rabbit, you ______ clean its hutch every day. should must must not

24. Cats are friendly and you don’t need to walk them. I think you ______ get a cat. should

25. a clean the cage/must/ once a week/You You must clean the cage once a week. B3 Rearrange the words and match the replies with letters: b You/at least once a day/should/take her out to the park You should take her out to the park at least once a day. 2 4

26. c You/a good cat brush/get/should You should get a good cat brush. d get a dog/you/If your flat is very small/should not If your flat is very small, you should not get a dog. e should/a bird or a goldfish/get/You You should get a bird or a goldfish. 3 1 3

27. f You/your dog/must/more often/walk You must walk your dog more often. g the right way to look after birds/You /get a book/should/about You should get a book about the right way to look after birds. 4 2

28. h brush your cat’s fur/should/every day/You You should brush your cat’s fur every day. 1