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去可能發(fā)生的動作或存在過的動作的推測性用法。That man can't be her husband she is still single.Who is knocking at the door? Can it be the postman?must表示肯定的推測,一般用于肯定句中。More and more trees must be planted in ??键c四:情態(tài)動詞的被動語態(tài)含有情態(tài)動詞的被動語態(tài)的結構為:情態(tài)動詞+ be + done (動詞的過去分詞)。(2)needn’t + have+動詞的過去分詞,表不需要完成但已完成的動作,暗含時間或精力上的浪費?!?2) mustn’t也可用于以may表示要求時的否定回答中。2. may的否定式為may not,譯成“可能不”,He may not be at 。May I e in ? 我可以進來嗎? No, you mustn’t. / can’,你不能。其回答方式有以下幾種:Yes, please .、 All right .、 No, thank you.5. would you…的回答方式有以下幾種:Yes, I will. (No, I won’t.)、 Sure . (I’m sorry , I can’t.)、 All right/ OK/ With pleasure. 、Certainly. (No, thank you .) 、Yes, please.【例題】—Would you do me a favor and pass on my thanks to Lily?—________. ’s right pleasure doesn’t matter trouble【解析】“對了”,“樂意效勞”, “沒關系” “不費事”。You had better not give the book to 。(一定不能說there will have)There are many students in our school.→There will be many students in our school. There will be a sports meeting next week.一定不能說:There will have a sports meeting next week.will與be going to do something區(qū)別:①. be going to表示近期、眼下就要發(fā)生的事情,will表示的將來時間則較遠一些,He is going to write a letter tonight. He will write a book one day.②. be going to表示根據主觀判斷將來肯定發(fā)生的事情,will表示客觀上將來勢必發(fā)生的事情。)9. will的用法:will表示意愿、意志、打算,可用于多種人稱。We should protect the 。Why not meet at the school gate at eight? Why don39。s go for a walk after supper.(2).用“What/How about...?”來提出建議;about后接名詞或動詞ing形式。7. shall的用法:shall表示征求對方意見(多用于第一、三人稱),Shall we go out for a walk?我們出去散步好嗎?在英語中,我們可以用其他多種方式提出我們的建議或征求對方意見。Dare he tell them what he knows ? 他敢告訴他們所知道的情況嗎?I daren’t ask her – will you do it for me ? 我可不敢問她,你能幫我問問嗎?(2)dare作為實義動詞,此時有人稱、數及時態(tài)的變化。如果是物作主語,一般用need doing與need to be done這種情況下應注意兩點:①. 主動形式的動名詞doing具有被動的含義;②.該動名詞可以改為其動詞不定式的被動形式而句子的意義不變?!狽o. you needn’t /don’t have ,你不必。注意其反意問句的構成形式: 當must表示肯定的判斷、推測時,其反意疑問句要用實際問句的助動詞來構成。You mustn’t be 。通常是用may +主+VMay you have a good 。She may be at . (3) .may的過去式為might,表示推測時。(注意回答)3. may的用法:(1).表示請求、許可,比can正式,May I borrow your bike?我可以借你的自行車嗎?You may go home ?!纠}】—I think Miss Gao must be in the library. She said she would go the