【正文】 動詞原形be+名詞/形容詞/介詞短語be + doing 例句： must be ’m Mathilde used to know each other very must be in bed already at this time of the teacher must be isn’t in must be must be something might be very clever, but she hasn’t got much mon may be arriving this may be traveling around the keys can’t be in the have just searched it very the news be true ?（三）對過去的事實進(jìn)行推測：結(jié)構(gòu)：情態(tài)動詞+have done / been+名詞/形容詞/介詞短語 例句： must have been a pretty girl in her couldn’t have seen Anna ’s gone think I must have left my glasses in the might have overslept can Tom have gone ? 情態(tài)動詞表達(dá)虛擬語氣：表達(dá)“本來?”，“不然早就?”。這是情態(tài)動詞的一種虛擬語氣用法。表示說話人所講的與所發(fā)生的事實相反。表達(dá)了說話人的埋怨，后悔的語氣。其結(jié)構(gòu)是在一些情態(tài)動詞后面加 have done 結(jié)構(gòu)。根據(jù)要表達(dá)的意思，有如下結(jié)構(gòu)：should have done / ought to have done：本應(yīng)該??shouldn’t have done / oughtn’t to have done：本不該??could have done：本來可以??needn’t have done：本來沒必要??would like to have done：本來很想??would rather not have done: 本來不愿意??could / might / have done: 不然早就?? 例句： shouldn’t have laughed at his could have told us ought to have bought that dictionary last ought not to have spent so much time in reading need not have been in a tearing hurry to catch the would like to have seen that film last he had given me his number, I could have telephoned might have been frozen to death but for the rescue in ：某些情態(tài)動詞的特殊用法：need 和dare 的兩種形式的用法need 和dare可以用做實義動詞，后面接不定式（to do）結(jié)構(gòu)，在疑問句和否定句中，加助動詞do/does/did/或don’t/doesn’t/didn’t。作為情態(tài)動詞使用時，主要用于疑問句和否定句中。情態(tài)動詞needn’t（沒有必要，不必）相當(dāng)于don’t have to 例句： is cold, you need to wear some warm I stay here with you for a while ? Thank you, you needn’ dare you speak to parents like that ? 注意：句型I dare say+從句。意思是：我肯定?? = I’m sure或There is no doubt that+從句。例句：I dare say that my uncle will get the money if I 表示“意志”或“愿意”，would 則指過去愿意做?? 例句： said that he would help may telephone if you will accept this “過去習(xí)慣做??”類似于“used to do” 例句： we were children, we would go swimming every summer in that ，固定的句型：Will/Would you please do?? / Would you like to do?? 例句：Will/Would you please give him a message when you see him ? shall ，三人稱，表示“請求”；“建議”或“推薦” 例句： we start the meeting now? I watch TV now ? my son carry the case for you ? ，表示“命令，“要求”，“許諾” 例句： shall take whatever you shall not go to the party with me if you make so much noise ，常用can /can’t /could / couldn’t表示，意思是：“可能?嗎?”；“?不可能?”。而不能使用mustn’t或must等詞。【典型例題】1.—Do you think he will do me a favor ? —As far as I know, he is the last one to help _____ be prepared to give you a hand, 分析：本題考查情態(tài)動詞推測性用法。根據(jù)he is the last one to help others.（他是最不可能幫助別人的人），既然如此，那么“幫助你”的可能性也就最小了。答案為A 2.—Look, someone is who it ____ be ? —I think it ___ be Tom.—I don’t think it ___ be 。must。can。he 。can。must。him 。can。must。his 。must。can。himself 分析：根據(jù)備選答案。can表示推測時用于疑問句或否定句中。本題首句就應(yīng)該是Guess who can it be? 第二句應(yīng)該是I think it must be Tom.（說話人十分肯定）。第三句表達(dá)了說話人對前一個人的否定。即：I don’t think it can be him/he.（不可能是他）。答案為A 3.—Do you know likes walking after supper ? — ____ around the campus be walking walk walk be walking 分析：關(guān)鍵詞Sure告訴我們說話人的口氣十分肯定。根據(jù)句子語境：她此刻肯定正在校園散步呢。must be doing表示肯定正在做。答案為A 4.—I stayed at a hotel in New York.—Oh, did you ? You _____ with have stayed stay say have stayed 分析：首句說：我在紐約住在一家賓館里。在此a hotel是泛指。所以D選項不合題意。第二句在說：。Could have done表示：本來可以。答案為A didn’t you tell me there was no meeting today ? I _____ all the way here through the heavy ’t have driven ’t have driven’t have driven ’t have driven分析：根據(jù)句意：你為什么不告訴我今天沒有會？我本來沒必要冒著大雪開車跑這么多路。Needn’t have done表示本來沒必要。答案為A was really anxious about _____ home without a ’t leave ’t have left’t have left ’t leave分析：根據(jù)句意：我真的很擔(dān)心你，你真不應(yīng)該一句話都不說就離開家。“離開家”已經(jīng)發(fā)生了。Should have done正好表達(dá)了本句的意思。答案為B ：Are you ing to Jeff’s party ? B：I’m not _____ go to the concert 分析：根據(jù)B的回答：我不一定去，我有可能去聽音樂會。Might表示推測：可能。答案為D ：I promise that she ____ get a nice present on her ：Will it be a big surprise to her ? 分析：A說：“我答應(yīng)她在生日聚會上她會得到一份生日禮物。shall表示許諾。答案為D 【模擬試題】：Is John ing by train ? B：He should, but he _____ likes driving his _____ at 8:30 for the meeting, but he didn’t show have arrived arrive have had arrived be arriving , I’m _____ have turned off the alarm and gone to sleep _____ be tired—You’ve only been working for an not ’t ’t not5.—I didn’t go to work yesterday afternoon because my car broke down.—You _____ wasn’t using borrow have borrowed have borrowed to borrow 6.—A man answered the suppose it was her husband.—It _____ her has been dead for ’t be ’t have been not have been ’t have been【試題答案】：根據(jù)B的回答“他應(yīng)該（坐火車來），但是也不一定，他喜歡開自己的車。本題考查了情態(tài)動詞的推測用法。may表示不十分有把握的推測。答案為D ：根據(jù)句意：White先生本應(yīng)該在8:30到這里出席會議的，可他（在8:30）沒有到場。Should have done表示：本應(yīng)該。答案為A ：本句是說話人在解釋遲到的原因：我或許是關(guān)掉鬧鐘又睡了。might have done 表示對過去的推測：可能已經(jīng)??答案為A ：根據(jù)后半句You’ve only been working for an hour.（你才剛干了一個小時）說明You _____ be tired（你不可能很累），can’t 表示“不可能”答案為C ：聽到對方說“昨天車壞了而沒去上班”，第二個人說“你本來可以借我的車去 上班?！北緛砜梢?能：could have ：第二個人是說：那個人不可能是她丈夫，因為她丈夫已經(jīng)去世多年了。根據(jù)對 話的語境，是在談?wù)撨^去的事，表示過去不可能：could not have done 答案為：B與it有關(guān)的主要句型it強(qiáng)調(diào)句型知識總結(jié)歸納：（一）it用做形式主語或形式賓語：根據(jù)句子結(jié)構(gòu)的需要，it用做形式主語或形式賓語，而真正的主語或賓語（to do 短語，doing短語，名詞性從句）則放在句尾。主要句型：It’s +形容詞/名詞+連詞+名詞性從句to do / make / think / feel it +形容詞/名詞+連詞+名詞性從句to do ： will bee more and more important to have a good knowledge of ’s usual for close friends to have similar ideas and ’s a pity that I didn’t think of it ’s no use going there so teacher thinks it no good learning without ’t I make it clear to you that I was not ing ? found it strange that no one would take the money.（二）其他句型 takes+時間段+sb.+ to do “據(jù)說，據(jù)報道，/人們認(rèn)為/相信/建議等It’s said that…….It’s reported that ……It’s believed/thought/suggested that…… 例句： generally takes time to reach this point—being on the same is believed that the two children went off exploring（探險）on their own and get stuck on the ’s suggested that we should have a meeting to discuss the was once predicted（預(yù)測）that British and American English would bee separate languages finally.（三）it在強(qiáng)調(diào)句型中：在英語中，為了突出強(qiáng)調(diào)句子的某一個成分（謂語除外），達(dá)到強(qiáng)調(diào)或使聽話人特別注意這一部分的目的。便形成了一種強(qiáng)調(diào)句型。It is / was+被強(qiáng)調(diào)的部分+that / who+句子的其他部分。It is / wa