GrammarM3Unit1说课.ppt

1) can的主要用法是： possibility,prediction, ability, request, blaming, offering help, etc. The girl can dance very well. Can the news be true? Can I sit here? Can I help you? How can you say that? I can’t say that he has finished his work. 2) could的主要用法是： A. could 是can的过去式, 表示与过去 有关的能力和推测: We all knew that the young man couldn’t be a doctor. 3) can和could接动词的完成时 may 和might ： may 的基本用法有三种: ?A. 表示请求、许可;比can较为正式: ?? May I come in ? You may go now. B. 表示 “也许” “可能”: 通常只用于肯定句和否定句中。 --I believe the man is from England. --But I may be wrong. The guest may arrive this afternoon. C. 表示祝愿;但语气较正式: May you succeed! May you have a good journey! might 的用法有: She said that he might take her bike. will和would： 1. will可以作助动词和情态动词 I will tell you something important now. He said he would tell me…… Would you like to have a try ? When she was young，she would read fairy tales. shall和should： 1. shall用于构成将来时是助动词,用于第一人称 shall用于征求对方的意见，表示 “决心” 是情态动词。 Perhaps I shall pay a visit to England this winter. （构成一般将来时, 助动词） Shall we go by train, Mom? （用于征求对方的意见，情态动词） I shall go at once. （表 “决心”，情态动词） 2. should表示义务、建议、劝告，意为 “应该”。 You should keep your promise. She should have passed the exam. She shouldn’t have left without saying a word. must和 have?to 1. A: ______ you like to go to a special event with us on Saturday? B: Yes, I __________ 4. A: If I want to be a doctor, _______ I study science? B: Yes, you _________. 5. A: He is very handsome. ____ he play the role of the prince? B: No, he _______________________ ______. 6. A: The neighbour’ s children are older this year. _______________ they stop playing tricks at Halloween? B: Perhaps, they __________ ________________________. __________________