1、Language points 情态动词精讲情态动词精讲 一一. can的用法的用法 1.表示能力表示能力 Eg: She can swim, but I cant. 2.表示请求、允许表示请求、允许，与，与may 意思相近。意思相近。 eg: Can I use your pen? 3. 表示推测表示推测，意为“可能”，常用在否，意为“可能”，常用在否 定句和疑问句中，表推测时，定句和疑问句中，表推测时，cant 意为意为 “不可能”“不可能” eg：The news cant be true. 二二.Could 的用法的用法 1.Can 的过去式，意为“能，会”的过去式，意为“能，会”。
2、eg: He could write poems when he was 10. 2.用于疑问句中，表示委婉的语气用于疑问句中，表示委婉的语气。 Could I sit here? Could you help me? 三三.may 的用法的用法 1.表示请求、许可表示请求、许可，比，比can正式。正式。 May I borrow your bike? 肯定回答：肯定回答：Yes, you can./ Yes, please. 否定回答：否定回答：No, you cant./ No, you mustnt. 2. 表示推测，表示推测，谈论可能性，意为“可谈论可能性，意为“可 能，或许”，一般用
3、于肯定句中。能，或许”，一般用于肯定句中。 It may rain tomorrow. 3.May 的过去式为的过去式为might, might表表 示推测时，可能性小于示推测时，可能性小于may. eg: He is absent from school. He might be sick. 4.表示希望、祈求、祝愿表示希望、祈求、祝愿，可翻译，可翻译 为“祝愿”，通常用在“为“祝愿”，通常用在“may+主语主语 +动词原形”结构中。动词原形”结构中。 eg: May you succeed. 四四. must 的用法的用法 1.表示主观看法表示主观看法，意为“必须，一定”，意为“必须，一定
4、” eg: Must I clean the room now? 2. mustnt 意为“一定不要，千万意为“一定不要，千万 别，”禁止，不许别，”禁止，不许 肯定回答：肯定回答： Yes，you nust. 否定回答：否定回答： No, you neednt. / No, you dont have to. eg: You mustnt run when you meet a bear. 3.must 表示有把握的推测表示有把握的推测，用在肯定，用在肯定 句中。句中。 eg: The light is on, he must be in the room. 4.比较比较must 和和 ha
5、ve to 五五.Will 的用法的用法 Will 表示意愿、意志、打算，表示意愿、意志、打算， 意为意为“将，将要，会”“将，将要，会”。 Eg: I will help you if Im free this afternoon. 六六. need. need的用法的用法 1.实义动词，用于肯定句。常用于结构实义动词，用于肯定句。常用于结构 need to do sth或或need doing sth. eg: You need to have a break. 2. 情态动词，用于疑问句和否定句中。情态动词，用于疑问句和否定句中。 肯定回答：肯定回答： Yes, you must. 否定
6、回答：否定回答：No, you neednt. / No, you dont have to. eg: Need I stay here any longer? The room needs cleaning. 七七.Shall的用法的用法 Shall 表示征求对方的意见，多用于表示征求对方的意见，多用于 第一人称，第一人称，shall I? Shall we? eg: Shall we go out for a walk? 八八. Should 的用法的用法 1.Should 意为“应该”，可表示劝意为“应该”，可表示劝 告、建议、义务、责任告、建议、义务、责任 等。等。 eg: We sh
7、ould protect the environment. 2. *should have done 表示“过去本表示“过去本 应该做而实际上未做”，含有责备或后应该做而实际上未做”，含有责备或后 悔的意味。悔的意味。 eg: You should have told me about his illness. 情态动词专项训练情态动词专项训练 1.- Must I come at 6:30 tomorrow? -No, you neednt. You _ come one hour later. A. Can B. need C. should D. must 2.-Is that Kate
8、s car? - It_ be hers. She has just gone for a meeting. A. cant B. should C. mustnt D. may A A 3.-Bob, where is Linda? - She _ be in the library. But Im not sure. 4.-May I take this magazine out of the reading room? -No, you _. You read it here. A. Must B. may C. need D. has to A. mightnt B. wont B.
9、C. neednt D. mustnt B D 5. -Many people play with mobile phones all day instead of reading books. - Thats too bad. Everyone _ be a book lover. Reading is more enjoyable. A. May B. should C. would 6. If you _ smoke, please go outside. A. can B. may C. must D. might B C 7. Honey, stay at home before I
10、 return. - I _, mum. A. must B. can C. will D. should 8. Here is my phone number. You _ call me any time you like. A. must B. can C. should D. need C B 9. We _ use mobile phones when the plane takes off. A. may not B. shouldnt C. neednt D. mustnt 10. The girl in the classroom _ be Mary, she called m
11、e from Beijing just now. A. mustnt B. neednt C. shouldnt D. cant D D 11. What does the song Never Say Never impress you most? -It tells us that we _ do almost anything if we never give up. A. Can B. have to C. should D. need A 12.-Mum, _ I visit the Movie Museum tomorrow? - Im afraid you cant. It is closed on Monday. A. must B. may C. should D. need 13. Must we stay here waiting for you? - No, you _. A. neednt B cant C. shouldnt A B 14. If you wish, you _ come in and have a cup of coffee. A. May B. must C. would D. should A
