人教版八年级下册英语 Unit3语法知识点讲解含答案.docx

1、Unit 3 Could you please clean your room? 语法篇 一教学目标 学生通过本讲学习，能够掌握本单元的重点语法，并在综合能力上有一定的拓展。 二知识点总结 Could 的用法 Could 表示有礼貌地提出请求，征求许可，其用法如下： 1. Could 表示有礼貌地提出请求。Could you (please) do.?表示“请你做. 好吗？”戒“麻烦你做.行吗？”could you (please) do.?的否定结构是在 please 后加 not。 Could you (please) set the table for supper? Could you

2、 (please) open the window and close the door? 2. Could 表示征求许可，希望得到允许。句型 Could I do.?表示“我可以做. 吗？” Could I go to the movies? 3. 回答时应注意几个问题： （1）对这样的句式作答时，与其它的一般疑问句不同，作肯定回答通常用 certainly, sure, of course 等。作否定回答时，通常以 sorry 开头。 （2）回答 could 引导的问句时要用 can 戒 cant，不能用 could。 即学即练 用所给词的适当形式填空 1. Could you pleas

3、e give (give) me a piece of cake? 2. Could you please not open (open) the door? 三例题讲解 1. Could I use the phone, Miss Li? _. A. Yes, you could B. Im sorry I cant C. Yes, sure D. No, please 解析：此题为 could 表示委婉请求，其回答不能用 could，应为实在的回答， 故选 C。 2. Could you please do the dishes? _. Im going to do my homework

4、. A. Sorry, I cant B. No, I couldnt C. Yes, you can D. Never 解析：此题为 could 表示委婉请求，其回答不能用 could，而应该用 can。同 时根据题意可知回答应该为否定，故选 A。 3. Would you please _ the children _ with the snake? A. to ask; not to play B. ask; not to play C. ask; not play D. ask; dont play 解析：would you please do/ could you please do

5、 的句型中，would you please 相当于情态动词，谓语用动词原形；ask sb to do 的否定形式为 ask sb not to do，其为动词不定式的否定，故选 B。 4. Could I look at your picture? Yes, of course you _. A. could B. can C. will D. must 解析：此题为 could 表示委婉请求，其回答不能用 could，而应该用 can, 故选 B 5. Could you please pass me the salt? _ A. Sure. Here you are. B. Good i

6、dea. C. Thank you. D. Im sorry to hear that. 解析：此题为 could 表示委婉请求，其回答不能用 could，而应该应为 yes，I can/sure 戒 sorry, I cant 等，故选 A 四课堂训练 基础演练 一、单项选择（共 10 小题；共 10.0 分） 1. Im busy. you please help me make the bed? A. Could B. May C. Must D. Should 2. you pass me a pen? Id like to write down the telephone numbe

7、r. A. Need B. Could C. Must D. Should 3. - I borrow your English book? - Yes, of course you . A. Could; could B. Must; can C. Could; can D. Can; could 4. - you lend me your camera? - No problem. Here you are. A. Might B. Could C. Must D. Should 5. - Could I go out with my friends tonight? - But you

8、cant stay out late. A. No, you cant. B. Yes, you can. C. Sure, you cant. D. Yes, you could. 6. - Could I give away my old clothes to the poor children, Mum? - Of course, you . Im really happy to hear that. A. can B. could C. must D. cant 7. You eat too many candies. Its bad for your teeth. A. must B

9、. can C. should D. shouldnt 8. - Shall I tell him the news after class? - You . I have told him already. A. cant B. mustnt C. shouldnt D. neednt 9. - Would Ann like to sing some songs with me? - Sorry, she cant. She study math. A. can B. may C. has to D. have to 10. - Have you decided when to go to

10、the beach? - Not yet. We go there this weekend. A. may B. need C. must D. should 二、翻译(根据中文提示完成句子)（共 5 小题；共 5.0 分） 11. 请你告诉我在哪里能买到邮票好吗？ where I can buy some stamps? 12. 请你倒垃圾好吗？ you take out the rubbish? 13. - 我能用一下你的钢笔吗？ - 不，你不能。 我正在写信。 - your pen? - , you . Im writing a letter. 14. 但是她能做什么来帮忙呢？ But

11、 what she do ? 15. 请你遛遛狗好吗？ Could you please the dog ? 三、完形填空（共 10 小题；共 15.0 分） A mother planted many kinds of vegetables in her garden. One day, she said to her 16 , Betty, come here. Look at all these little yellow marks on the 17 of the cabbages. They are eggs of a kind of insect(虫子). They are ve

12、ry beautiful but very bad for cabbages. This afternoon you must 18 all the eggs on the leaves and kill them. In this way, you will help us have 19 , greener and bigger cabbages. Betty didnt want to do it 20 and in the end she forgot all about it. The mother fell ill for a few days and 21 work in her

13、 garden. When she was well, she took Betty with her to the garden to see the cabbages. To 22 surprise, the insects had eaten every leaf. When Betty saw this, she began to 23 . Then her mother said to her, We should never put off (推迟) what we have to do today till 24 . And you must learn to deal with

14、 the bad things while they are small, 25 they will turn into big problems. 16 A. father B. mother C. daughter D. son 17 A. trees B. leaves C. grass D. flowers 18 A. find B. eat C. fly D. sell 19 A. worse B. smaller C. thinner D. better 20 A. at most B. at least C. at once D. at last 21 A. mustnt B.

15、couldnt C. need D. should 22 A. my B. your C. his D. their 23 A. cry B. wait C. run D. laugh 24 A. yesterday B. today C. tomorrow D. spring 25 A. but B. so C. and D. or 答案 一、单项选择 1. A 2. B 3. C 4. B 5. B 6. A 7. D 8. D 9. C 10. A 二、翻译(根据中文提示完成句子) 11. Could/Can you tell me 12. Could, please 13. Could I use, No, cant 14. could, to help 15. take, for a walk 三、完形填空 16. C 17. B 18. A 19. D 20. C 21. B 22. D 23. A 24. C 25. D