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1、.Unit 1 语法篇_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。一、情态动词can的基本用法情态动词can有一定的词义,但不能独立存在,它必须与动词原形一起构成谓语。情态动词can没有人称和数的变化。其具体用法如下:1.表示能、会,指脑力或体力方面的能力。例如:I can speak English.我会讲英语。Jim can swim but I cant.吉姆会游泳,但我不会。2.表示可能,常用于否定句或疑问句中,指某种可能性。例如:Han Mei cant be in the classroom.韩梅不可能在教室里。Can he come here tod
2、ay, please?请问他今天能到这里来吗？3.表示可以,常用于口语中,指许可或请求做某事。例如:Can I have a cup of tea, please?请问我可以喝一杯茶吗？You can go out.你可以出去了？二、情态动词的注意事项1. can的口诀：情态动词can、can、can，动词原形跟后面。 变疑问can提前，变否定not后面加上去。 主语人称单复数，情态动词不能变。2. 情态动词can可以引导肯定句和疑问句。（1）、肯定句：主语 + can + 动词原形 + 其他成分（2）、疑问句：can + 主语 + 动词原形 + 其他成分3.can 引导的肯定句变为疑问句的方
3、法：（一调二改三问号）（1）、can 提前，首字母大写。（一调）（2）、肯定句中主语在变成疑问句时的变化。（二改） 如：肯定句：You can feed the animals.你可以喂动物。 疑问句：Can I feed the animals?我能喂动物吗？ （3）、在句尾后面加问号。（三问号）4. Can的一般疑问句回答：（1）、肯定回答：Yes，主语（必须人称代词） + can.（2）、否定回答：No，主语（必须人称代词） + can not （cant）/mustnt. Yes 或 no 后要使用逗号，除了I 以外，其他人称都要小写。5、表推测是肯定推测用must be，否定推测为c
4、ant be 1_ I take some photos in the hall? No, you _.A. Can, neednt B. Must, mustnt C. Could, wont D. May, mustnt2Who is the man over there? Is it Mr. Li? No, it _ be him. Mr. Li is much taller.A. mustnt B. may no C. cant D. neednt3Dad, must I finish my homework today? No, you _. You may do it tomorr
5、ow.A. neednt B. mustnt C. dont D. wont4Must I go with them tomorrow？ No，you _. A. mustnt B. shouldnt C. neednt D. cant5. Can I watch TV for a while？ No, you _. You have to finish your homework first. A. shouldnt B. cant C. mustnt D. wont解析：1. neednt表示没有必要 mustnt 表示禁止；can，may的一般疑问句的否定回答按照语气的轻重都可以分为ca
6、nt和mustnt两种。本题意思是我可以在这拍照吗？不，你禁止在此拍照。故选D2. 本题考的是情态动词表推测，must be表示肯定推测 cant be表示否定推测，故选C。3. must的一般疑问句的否定回答为neednt或 dont have to，故选A。4. must的一般疑问句的否定回答为neednt或 dont have to，故选C。5. can，may的一般疑问句的否定回答按照语气的轻重都可以分为cant和mustnt两种。此题是你禁止这样，你必须先完成作业，故选C。基础演练一、用can, , must, need的适当形式填空：1. You _ return the libr
7、ary book on time.2. I _ (not) find the way to the hospital. _you show me the way?3. _ I finish the work right now? No, you _ (not). You _ do it later.4. Its time for class. You _ stop playing football 。5. We _ start right now, or they would get there first.二、选择正确的单词填空 (who, where, when)1._ is that p
8、retty girl? She is my sister.2._ are Jack and Tom? They are behind you.3._ do you go to school? I go to school from Monday to Friday.4._ has a beautiful flower? John has a beautiful flower.5._ are they? They are my parents.答案：一、1：must 2:can not ,can 3: Must ,need not , can 4:must 5:must 二、1:Who 2:Wh
9、ere 3:When 4: Who 5:Who三、单项选择1. Susan is good at English and she sing English songs. A. needB. mayC. canD. must2. I ride a bike, but I drive a car. A. can; canB. cant; cantC. can; cantD. am; am not3. - Lisa, you speak French? - Yes, but only a little. A. needB. mustC. mayD. can4. - Mary, you play ch
10、ess? - Yes, I can do it very well. I want to join the chess club. A. canB. shouldC. mustD. need5. The boy has no arms. He write with his hands. A. canB. mustC. cannotD. may6. My sister can play the piano well. (改为一般疑问句并作出肯定回答) your sister the piano well? Yes, she . 7. Tony can cook Chinese food. (就划
11、线部分提问) Tony do? 8. Many students can sing this song. (对划线部分提问) many students ? 9. I can play the guitar. (用the trumpet改为选择疑问句) play the guitar the trumpet?10. We want to join the music club. (就划线部分提问) you want to join? 1-5 CCDAC6. Can,play;can 7. What can 8. What can; do 9. Can you, or 10. What club do巩固提高1. 李连杰会表演功夫。Jet Li kung fu.2. 我姐姐不会跳舞。My sister .3. 他哥哥小提琴拉得好。His brother .4. Susan不会弹钢琴。Susan piano.5. 我想加入音乐俱乐部。I the music club.答案：1. can do 2. cant dance 3. plays the violin well 4. cant play the 5. want
