【正文】 此處是與現(xiàn)在事實(shí)相反的假設(shè)，主句謂語動詞應(yīng)使用would/could/might/should＋do。t been faced with so many barriers, I __would/could/might/should__not be where I am．解析：考查虛擬語氣。2．(2020根據(jù)后面的“as long as we leave it clean and tidy”可知，Jim許可我們待在他的房子里，即：我們“能，可以”待在他的房子里。天津卷改編)Jim says we __can__ stay in his house as long as we leave it clean and tidy．解析：考查情態(tài)動詞。d better．．．/You might as well．．．/Why not．．．？等?！　∫族e聚焦 1．表達(dá)的單調(diào)性例如在寫一封回信向好友表達(dá)建議時，重復(fù)使用You should．．．既顯得單調(diào)，同時強(qiáng)硬的語氣影響了交際效果。t。t/can not．．．enough表示“再……也不為過”，符合句意。t__ thank you enough for what you have done for me．—You39。判斷虛擬語氣，除了常見的if虛擬條件句，還應(yīng)注意其他常搭配虛擬語氣的標(biāo)志詞，如suggest，would rather，as if，wish，otherwise，or，but for等。然后根據(jù)句意或句式結(jié)構(gòu)填入恰當(dāng)?shù)那閼B(tài)動詞。注：“情態(tài)動詞＋have done”的用法在前面已進(jìn)行了詳細(xì)解釋，在此只是簡單歸納。t have done意為“不可能做了……”，表示非常有把握的否定推測。(1)must have done意為“一定做了……，準(zhǔn)是做了……，”表示非常有把握的肯定推測；can39。They must be talking about us．他們一定正在談?wù)撐覀?。他說過他要拿。(3)“ought to/should＋do”意為“(按道理說)應(yīng)該……”，表示有把握的推測，但語氣上留有余地。(2)“may/might/can/could＋do”表示對現(xiàn)在或?qū)戆l(fā)生的事情的推測。1．情態(tài)動詞＋do(1)“must＋do”表示對現(xiàn)在的情況進(jìn)行有把握的推測，一般用于肯定句，語氣最強(qiáng)。t。t__ take the umbrella．解析：句意：根據(jù)今天的天氣預(yù)報，今天不下雨，所以你沒有必要帶雨傘。(3)According to today39。故應(yīng)填can39。(2)He is too young and __can39。故應(yīng)填mustn39。t填空(1)There is a meeting inside．You __mustn39。t，musn39。t指“不允許，一定不要”；needn39。t can39。t，mustn39。t不可能，在此表示有把握的否定推測，符合句意。s only six o39?！镜淅俊t __can39。很明顯，can39。t與may notcan39?！镜淅俊∮胏ould或was able to填空The fire spread through the hotel very quickly, but everyone __was able to__ get out．解析：由句意可知此處應(yīng)該是所有人經(jīng)過努力最后出去了，所以應(yīng)該用was able to。He opens his mouth as if he would say something．他張開嘴巴，好像要說什么。It seems as though it were spring already．看起來好像已經(jīng)是春天了。re in．If only we had taken our teacher39。(6)if only引導(dǎo)的感嘆句中，用虛擬語氣表示愿望。It is time that you went to school．你該去上學(xué)了。(5)在“It is (about/high) time＋that 從句”中，謂語動詞常用過去式或“should＋動詞原形(其中should不能省略)”。George is going to talk about the geography of his country，but I39。It is necessary that students (should) respect teachers．學(xué)生應(yīng)該尊重老師，這是必要的。(3)在“It is necessary/important/strange/natural/essential＋that從句”中，謂語動詞常用“should＋動詞原形”，should 可以省略。How I wish I had listened to my parents39。(2)wish后跟賓語從句時用虛擬語氣。The expression on his face suggested that he was very angry．他臉上的表情表明他很生氣。記憶口訣一主張：insist二命令：order，mand三建議：suggest，advise，remend四要求：request，require，ask，demand外加一個敦促：urgeThe school remends parents not permit their children to swim in rivers or lakes during summer holidays．學(xué)校建議父母們在暑假期間不要讓自己的小孩在河里或湖里游泳。常見的動詞有：demand，order，require，insist，suggest，advise，request，urge，mand，remend等。He telephoned to inform me of your birthday，or I would have known nothing about it．(連詞)他打電話通知了我你的生日，否則，我對此一無所知。I was ill that day．Otherwise，I would have taken part in the sports meeting．(副詞)我那天病了。t have succeeded．(介詞短語)要不是你的幫助，我們是不會成功的。3．含蓄虛擬語氣有時，假設(shè)的情況并不用條件從句表達(dá)，而是暗含在上下文中，由otherwise，but，or，without，but for 等來表達(dá)。2．錯綜時間虛擬條件句當(dāng)從句謂語動詞與主句謂語動詞所發(fā)生的時間不一致時，它們的形式要根據(jù)各自所發(fā)生的時間作出相應(yīng)的調(diào)整。If you had e earlier，you would have caught the bus．→Had you e earlier，you would have caught the bus．如果你來得早些，你就會趕上公共汽車了。特別提示：條件句中有were，had或should時，如果省略if，則需把were，had或should放在主語前，構(gòu)成倒裝結(jié)構(gòu)。If you had studied harder last term，you could have passed the exam．如果上學(xué)期你學(xué)習(xí)更努力的話，你考試就會及格了。(已經(jīng)澆了)I would have helped you but I was busy at that time．我本來想幫你可是當(dāng)時很忙。(已經(jīng)喝了)You needn39。t have drunk．——我非常贊同?！狪 can39。t to/shouldn39。Could he have left the work unf