【正文】 比較：didn’t need to do 沒必要做也沒有做 我沒必要擦窗戶。（從句發(fā)生在現(xiàn)在，主句發(fā)生在將來。，如果詞語動詞是be，則一切人稱均可用were。If only he had taken my advice years ago.要是幾年前他聽了我的勸告就好了。（虛擬語氣，在說話人看來，他并沒有喝醉）（3）it is (high, about) timeit is (high, about) time后的that從句謂語動詞用一般過去時，表示“已到了該干…的時候了”，含有“已經(jīng)有些晚了”的意思。（5）在lest, for fear that, in case, so that引導(dǎo)的從句中 在lest, for fear that, in case, so that 引導(dǎo)的目的狀語從句中，謂語動詞一般用虛擬語氣，從句的謂語動詞一般用：should/could/might + 動詞原形He reminded her twice of it lest she should forget.他提醒了她兩次，怕她忘記。She insisted that the seats (should) be booked in advance.她堅持要預(yù)定座位。如：We will finish it on time no matter what / whatever may happen. 不管發(fā)生什么事，我們都要按時完成。I was astonished that he should not answer such an easy question. 我很驚訝他竟答不出如此簡單的問題。4. 英語中，would rather, had rather, would sooner等之后的賓語從句常表示與客觀事實不相符的一種愿望，故使用虛擬語氣。如：It is time that I went to pick up my daughter at school. 我該去學(xué)校接我的女兒了。I would try my best to help you. 我會盡力幫助你。d think he was Prime Minister. 聽他講話你會以為他是首相。 be operated on6. I forget where I read the article, or I ________ it to you now. A. will show B. would show C. am going to show D. am showing 7. —Why didn’t you go to yesterday’s meeting?—I would have but I ________ too busy working on the important experiment.A. had been B. was C. were D. am8.—Don’t you think it necessary that he ________ to Miami but to New York?— I agree, but the problem is ________ he has refused to.A. will not be sent。7. B。10. B。5. D。1. “I still haven’t thanked Aunt Lucy for her present. ” “It’s time you ________. ”A. Do B. did C. had D. would2. “I’ve told everyone about it. ” “Oh, I’d rather you ________. ”A. Don’t B. hadn’t C. couldn’t D. wouldn’t3. It has been raining for a day, but even though it hadn’t rained, we ________ there by tomorrow. A. can’t get B. won’t get C. hadn’t got D. wouldn’t get4. Yesterday, Jane walked away from the discussion. Otherwise, she ________ something she would regret later. A. had said B. said C. might say D. might have said5. All the doctors in the hospital insisted that he ________ badly wounded and that he ________ at once. A. should be。如：If you’d listened to me, you wouldn39。4. 習(xí)慣表達(dá)中常用的虛擬語氣。He told us his idea that he should go to university. 他告訴了我們他的想法：他想上大學(xué)。如：Can you believe that he should kill a tiger? 你能相信他竟殺死了一只老虎？Can you imagine that he should take the first place in the long jump contest? 你能想象得到他在跳遠(yuǎn)比賽中竟獲得了第一名？3. 英語中，wish之后的賓語從句，表示一種沒有實現(xiàn)或根本不可能實現(xiàn)的愿望，常用虛擬語氣。He coughed twice as if someone should e. 他咳嗽兩聲就好像有人要來了。2. 讓步狀語從句中的虛擬語氣(1) 在even if, even though 所引導(dǎo)的讓步狀語從句中，可用虛擬語氣，主句、從句的結(jié)構(gòu)與if所引導(dǎo)的條件從句結(jié)構(gòu)相同。此外還有amazing, odd, ridiculous, surprising, unthinkable等，也適用于上述結(jié)構(gòu)，但即使在美國英語中，should也不省略。作用相當(dāng)于非真實條件句中的if條件從句。（與過去事實相反，我們沒有相識多年）It seemed as if the meeting would never end.看起來會議不會結(jié)束了。意義與用法和I wish基本相同。I would have succeeded with you help.如果有你的幫助，我本會成功。因此，主句和從句的謂語動詞要根據(jù)各自的不同時間選用適當(dāng)?shù)奶摂M語氣形式，其形式依據(jù)時間的不同仍然遵循表1給出的規(guī)則。此外還可用來表示命令、建議、設(shè)想、祝愿（或詛咒）等等，以及表達(dá)說話人的主觀愿望。bird,is!她是多好的一位老師啊！ 祈使語氣祈使語氣：表示說話人對對方的請求或命令。①TherealloffI(2)與過去事實相反If I had left a little earlier, I would have caught the train.我要是早點動身就趕上火車了。這種句型主要見于書面形式。（愿望與現(xiàn)在的事實相反）We wish he hadn’t gone.我們真希望他沒有走。）（2）as if (as though)as if 或 as though 引導(dǎo)的方式狀語從句有時要用虛擬語氣。（4）but for和but that在帶有but for和but that的句型中，一般要使用虛擬語氣，but for和but that都譯為“要不是…”、“如果沒有…”，其中but for是介詞，后接名詞；but that是連詞，后接從句。God save the Queen!上帝保佑女王！God bless you！上帝保佑你！Long live peace！和平萬歲Heaven forbid that I should let my own parents suffer.讓自己的父母受苦，天理不容。（同位語從句）適用上述結(jié)構(gòu)的名詞有Advice, agreement, decision, decree, demand, determination, indication, insistence, instruction, motion, order, preference, proposal, request, requirement, resolution, stipulation, suggestion等等。We must respect him no matter what / whatever mistakes he may have made. 不管他犯過什么錯誤，我們必須尊敬他。如：The teacher advised that we should make good use of every minute here. 老師勸我們要好好地利用在這兒的每一分鐘。句型：(1) It is admirable / dreadful / extraordinary