情態(tài)動詞can may must should would 情態(tài)動詞can may must should would Must (1)以must 開頭的一般疑問句----肯定回答: 只能用must ----否定回答: A: mustn’t (一定不行) B: needn’t (沒有必要) (2)Must 和have to 用法的區(qū)分: 表示“必須,一定”是,句子是一般現(xiàn)在時的時候只能用 must , 其他各種時態(tài)都用have to May (1)表示對客觀事實可能性的推測: may +do 表示對現(xiàn)在情況的推測; may have +動過分表示對過去情況的推測 (2)以may 開頭的一般疑問句----肯定回答: 通常都用may ----否定回答: A: may not (不可以) B: mustn’t (絕對不行) Would Would 主要是表示“愿意”,其次作為will 的過去式使用,多用于情景對話里. (1)Would you like some tea? Yes, please.\ No, thanks. (2)Would you like to join us? Yes, I’d like to. \ I’d like to but… (3)Would you like me to help you with your English? Yes,please.\That’s very kind of you. No, thanks. \ No,thank you. I can do it myself. 情態(tài)動詞練習 ( ) 1. ----Must I get up early tomorrow, Dad? ---- No, you . Tomorrow is Sunday. A. can’t B. mustn’t C. needn’t D. couldn’t ( ) 2. ----- I have some chocolates now? ----No, you . It’s time for bed. You can have some tomorrow. A. May , mustn’t B. Must, needn’t C. Must, mustn’t D. May, needn’t ( )3. After a long walk, the old man be tired now. A. can B. must C. has to D. need ( ) 4. Even the top students in our class can’t work out this problem, so it be very difficult. A. may B. must C. can D. need ( ) 5. Computers process difficult problems very quickly. A. must B. need C. should D. can ( ) 6. Cars, buses and bikes stop when the traffic lights change to red. A. can B. may C. must D. need ( ) 7. Susan’s parents have bought a large house with a swimming pool. It be very expensive. A. must B. can C. mustn’t D. can’t ( ) 8. We keep the new traffic law and learn how to protect ourselves. A. may B. should C. can D. need ( ) 9. --- I fill in the check-in form right now, sir? ---No, you needn’t . You can complete it this afternoon. A. May B. Can C. Would D. Must ( ) 10. It’s nearly seven o’clock. Jack be back home at this moment. A. must B. need C. could D. can ( ) 11. You leave this work for tomorrow. You finish it today. A. can’t , may B. needn’t , must C. mustn’t ,must D. may, should ( ) 12. You take an umbrella with you because it’s fine. A. can’t B. may not C. mustn’t D. needn’t ( ) 13. Professor Wang in the meeting room because I saw him in the supermarket a moment ago. A. must be B. mustn’t be C. can be D. can’t be ( ) 14. The walls look clean. They . A. needn’t painted B. don’t need painted C. needn’t to be painted D. don’t need painting ( ) 15. Our class teacher, Miss Liu , can hardly ride her bicycle to school, ? A. can she B. can’t she C. isn’t she D. does she ( )16. A: Must I finish my homework before I play video games, Mum? B: I’m afraid you . A. must B. mustn’t C. can D. can’t ( ) 17. Though little Tom is only five, he draw very beautiful pictures. A. must B. may C. can D. need