【正文】 st have done sth的用法，表示對過去的肯定推測。t，表示 禁止 時，疑問部分就可以用 must或 may， You mustn’t stop your car here, must you? (may we?)你不能把車停在這地方，知道嗎？ 16． He must be helping the old man to water the flowers,_______?[2020陜西卷 ] A． is he B． isn’t he C． must he D． mustn’t he B 32.—Hi, Tom . Any idea where Jane is? — She _____in the classroom . I saw her there just now.[2020重慶卷 ] A. shall be B. should have been C. must be D. might have been 30. It’s the office! So you ____ know eating is not allowed here.[2020湖南卷 ] Oh, sorry. A. must B. will C. may D. need C A 1. Guess what! I have got A for my term paper. [2020 上海卷 ] Great! You ______ read widely and put a lot of work into it. A. must B. should C. must have D. should have 2. The teacher _______have thought Johnson was worth it or she wouldn39。t you ? 下學期你應該努力學習，對嗎？ B． must表示“ 必須 ”，其疑問部分用 needn39。 A． must表示“ 應該 ”，其疑問部分用 mustn39。（ haven’t / hasn’t + 主語） You must have told her about it, haven’t you? 你一定把這事告訴她了，是嗎？ （二）陳述部分有表示過去的時間狀語，疑問部分的動詞就用 一般過去時。t you? 你一定知道這項練習的答案，是不是？ That must be your bed, isn39。 陳述部分有 must 的疑問句，疑問部分根據(jù)實際情況而定。 must著重說明主觀看法， have to 強調客觀需要。 The road is wet. It must have rained last night. must 和 have to ,肯定回答用 must否定式用 needn’t或 don’t have to，做 “不必” ,mustn’t表示“禁止，不允許” — Must I finish all assignments at a time? — Yes, you must. No, you needn39。 They are playing basketball, they must have finished their homework. 路是濕的。 Naturally, after I told her what to do, my daughter must go and do the opposite. 自然地，在我交代女兒做什么之后，她偏偏要做相反的事情 . I didn’t hear the phone. I must_have been asleep +be doing/do 表示對 現(xiàn)在的動作 進行肯定推測 他現(xiàn)在一定在看小說 He must be reading novels now. 他們買了一輛新車。 There must be something wrong with the puter You have worked hard all day. You must be tired。情態(tài)動詞沒有人稱和數(shù)的變化，有詞義但不完整，不能單獨作謂語，必須和不帶 to的不定式連用。2020— 06— 26楊菡（河南鄧州六高中） .1 She looks very happy. She ______ have passed the exam. [2020 江蘇卷 ] I guess so. It39。s not difficult after all. A. should B. could C. must D. might 2— what do you mean,there are only ten tickets?there ____be twelve.[2020全國卷 ] Ashould Bwould Cwill Dshall 3. John promised his doctor he ________ not smoke, and he has smoked ever since.[2020北京 ] A. might B. should C. could D. would. C A D 情態(tài)動詞有 can， could， may， might，must， have to， shall， should， will，would， need， dare等。情態(tài)動詞一直是高考的重點和難點，本文試就 202020202020年全國各省市高考試題中的情態(tài)動詞考例作一歸納 情態(tài)動詞有一定的意義，但沒有人稱和數(shù)的變化，不能獨立使用，它和后面的動詞構成謂語． 只作情態(tài)動詞的 can/could, may/might, ought to， must 可情態(tài)可實義的 need, dare/dared 可情態(tài)可助動詞的 shall/should, will/would 相當于情態(tài)動詞的 have to, used to 表示推測時， 只能用于 肯定句。 注意： Must用于肯定句中可表示“偏偏”。 他們一定很有錢 They have bought a new car. They must have a lot of money. +have done 表示對 過去發(fā)生的事情 作出的肯定判斷 他們在玩籃球， 他們一定完成了作業(yè)。昨天晚上一定下雨了。t. You mustn’t get down while the car is still moving. I don’t like this TV set. We must buy a new one. There was no more bus. They had to walk home. “必須”這個意思時， must 和have to 稍有區(qū)別。另外，have to 能用于更多時態(tài)。 ① 對 現(xiàn)在 動作或存在的情況的 推測 ： You