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1、虛擬語氣的幾點特殊用法1、在錯綜條件句子中,虛擬條件從句和主句動作發(fā)生的時間不一致,因此,主句和從句的謂語動詞應(yīng)根據(jù)所指的時間選用適當(dāng)?shù)奶摂M語氣形式。例如:1)If I were you,I wouldnt have missed the film last night. 如果我是你,我就不會錯過昨天晚上的那部電影。(從句與現(xiàn)在事實相反,主句與過去事實相反。)2)If he had followed the doctors advice,he would recover already. 如果他遵照醫(yī)生的勸告,現(xiàn)在病就好了。(從句與過去事實相反,主句與現(xiàn)在事實相反。)2、在if 虛擬條件句中,

2、有時可把連詞省去,采用倒裝語序把謂語動詞were 或助動詞did,had,should 移到句首構(gòu)成非真實條件從句的另一種句型,其意思不變。例如:1)Had we time to spare,we would be glad to go to the park. 如果能抽出時間,我們很樂意逛公園。2)Were it not for the discovery of electricity,the modern world would experience great inconveniece. 假如沒有發(fā)現(xiàn)電,現(xiàn)代世界將很不方便。3、有時假設(shè)的情況不用if 引導(dǎo)虛擬條件從句來表述,而用介詞(如

3、 without, but for 等 )引出的短語、分詞(如 supposing 等 )引出的短語、并列連詞(如 or,otherwise,but,though 等 )、由動詞suppose引出的祈使句或通過上下文的意思來表達(dá)。此時句中謂語動詞仍采用虛擬語氣的相應(yīng)形式。例如:1)But for your advice,I would not be able to do this work. 要不是你的勸告,我是不會做這份工作的。2)Victor obviously doesnt know whats happened,otherwise he wouldnt have made such a

4、 stupid remark. 顯然維克多不知道發(fā)生了什么事情。不然的話,他就不會說這樣愚蠢的話了。4、在一些表示愿望、建議、請求、命令等含義的動詞后面的賓語從句中,謂語動詞用動 詞 原 形 或 should 動 詞 原 形 表 示 虛 擬 語 氣 。 這 類 動 詞 有 ask,demand, insist,order,propose,move,desire,require 等。例如:1)They demanded that the aggressor troops(should)be withdrawn immediately. 他們要求立即 撤出侵略軍。2)I moved that he

5、(should)be discharged for his serious mistake. 我建議,由于他犯有嚴(yán)重錯 誤,應(yīng)解除他的職務(wù)。5、在would(had)rather(would sooner,would as soon) 賓語從句句型中,要求后面的賓語從句用虛擬語氣。但這種虛擬語氣表示的不是與事實相反的假設(shè),而是一種尚未實現(xiàn)的愿望,其從句謂語動詞用一般過去時。例如:1)I would rather you came next Friday. 我希望你下周五來。2)Id just as soon you didnt speak rudely to her. 我真希望你別對她那么粗魯

6、地講話。6 、 在 和 idea,necessity,plan, motion,order,proposal,recommendation,suggestion,under- standing等詞有關(guān)的同位語或表語從句中,謂語動詞用動詞原形或should +動詞原形表示虛擬語氣。例如:1)M y idea is that the group(should)hold another session to discuss the problem. 我的意見是 小組召開另一次會議來討論這個問題。2)Emphasis is laid on the necessity that all the obje

7、ctives to be attained be taken into account before starting a new project. 我們強(qiáng)調(diào)在開始制定一個新的計劃之前,必須把要達(dá)到的所有目標(biāo)都考慮進(jìn)去。7 、 在 某 些 It is 形 容 詞 that. 句 型 中 , 如 It is important(necessary,essential,natural,desirable,unusual,pity,strange)that. , that 所引導(dǎo)的主語從句中謂語動詞均用動詞原形 或 should 動詞原形來表示虛擬語氣。例如:1)It is highly desir

8、able that a new president be appointed for this college. 人們迫切地希望能 給這個學(xué)院派一個新院長。2)It is strange that the girl(should)be so arrogant. 真奇怪,這個女孩竟會如此傲慢。8、在 It is ordered(suggested,demanded,moved,planned 等 ) that.這個句型中,that 引導(dǎo)的主語從句要用虛擬語氣形式,謂語動詞用動詞原形或should +動詞原形。例如:1)It is moved that Lucy give a performanc

9、e at the party. 有人提議露茜在晚會上表演一個節(jié) 目。2)It was suggested that more teachers(should)be sent there to help them. 有人建議派更多的老師去那兒幫助他們。9、 as if /though 可以引出一個狀語從句也可以引出一個表語從句。當(dāng)as if though 跟在be, feel, look, seem, sound等系動詞之后時,引導(dǎo)的是表語從句;如果主句的謂語動詞不 是聯(lián)系動詞be 等, as if though 引導(dǎo)的則是方式狀語從句。無論是哪種類型的從句,只要從句的內(nèi)容是不真實的,都必須用虛

10、擬語氣。當(dāng)從句表示與現(xiàn)在的事實相反,謂語動詞用一般過去時;表示與過去事實相反要用had 過去分詞;表示與將來可能相反的則用would(could , might) 動詞原形 。例如:1)I feel as if I were going to faint. 我感到我像要昏過去似的。(與現(xiàn)在事實相反的表語從句)2)She cried as if her heart could be broken. 她哭的好像心都要碎了。(與將來可能相反的主語從句 )10、 在 It is(about /high)time 引導(dǎo)的定語從句中,也可以根據(jù)需要使用虛擬語氣,用以表示(此刻)該做而沒有做的意思,其謂語動

11、詞用過去時或should +動詞原形(用should時,不能將其省略)。例如:1)It is time I should leave. 我該走了。2)It is about time that you got(should get) dressed. 你該穿衣服了。11、 if only 引導(dǎo)的是省略了表示結(jié)果的主句的虛擬結(jié)構(gòu),現(xiàn)在已成為慣用法,表達(dá)愿望。從句用過去時表示現(xiàn)在沒有實現(xiàn)的愿望;對過去沒有實現(xiàn)或不能實現(xiàn)的愿望,從句就用過去完成時。這類句型表示一種不真實的條件,常譯成要是就好了!例如:1)If only I had taken mothers advice. 我要是聽取媽媽的建議就好

12、了。2)If only I could speak several foreign languages. 我要是能講幾種外語就好了。12、 在以 in order that,so that,lest 引導(dǎo)的目的狀語從句中,謂語動詞一般用虛擬語氣。從句中的謂語動詞用may(might)+動詞原形或should +動詞原形。在以lest引導(dǎo)的從句中, 謂語動詞用should +動詞原形。例如:1)She stayed at home for a few days so that she might take care of her sick mother. 她在家里 呆了好幾天,以便能照顧生病的母

13、親。2)The teacher explained the sentences again and again in order that the students could understand them clearly. 老師一再解釋這些句子以便學(xué)生能夠清楚地理解。虛擬語氣詳解在英文句子中,謂語動詞的語氣是用來表示說話人對所講內(nèi)容的態(tài)度、看法以及心情等。英文句子中謂語動詞的語氣有三種:A)直陳語氣(The Indicative Mood )直陳語氣用于直截了當(dāng)?shù)仃愂鍪聦崱⒚枋鰻顟B(tài):He has published quite a number of essays this year .他

14、今年已發(fā)表了好幾篇論文。B) 祁使語氣(The Imperative Mood )祁使語氣用于提出請求、命令、建議或是勸告等:Wait outside until you are asked . 請在外面等候,請你進(jìn)再進(jìn)去。Lets justtake a break, shall we ? 我們休息一會兒,好嗎? C) 虛擬語氣( The Subjunctive Mood ) 虛擬語氣用于表示主觀愿望和假設(shè)的虛擬情況。虛擬語氣不太顧及事實的存在,它表現(xiàn)出說話人的主觀因素比較多。所以說話人所講的內(nèi)容往往是與事實相反的;或是其實現(xiàn)的可能性微乎其微,甚至于沒有實現(xiàn)的可能性。當(dāng)然,有時為了使說話的語氣

15、客氣、緩和、委婉,也使用虛擬語氣。例如:I wish you were more careful . 但愿你更細(xì)心一些。If I had more money, Iwould buy a bigger apartment. 我要是有再多一點錢,我就買一套更大一些房子。Would youmind shutting the door ? 勞駕您把門關(guān)上。用于非真實條件句中的虛擬語氣條件句分為兩種: 真實條件句和非真實條件句。與現(xiàn)在事實相違背If I had time, I would certainly join you inthe tennis match. (事實是:我沒有時間)我要是有時間肯

16、定和你一起打這場網(wǎng)球比賽。If Iwere you, I would put her suggestion into account. (事實是:我并不是你)我要是你,我會考慮她的建議的。與過去事實相違背If I hadnt been caught by something, I would have come toyour party yesterday.(事實是:我昨天被某些事纏住了)我昨天要不是被些事纏住了,我就會去參加你們的聚會了。If he had taken my advice, he might not have made such a bad mistake.(事實是:他沒有聽

17、我的建議)要是他聽進(jìn)了我的勸告就不會犯這么嚴(yán)重的錯誤了。與未來事實相違背If I should have a chance to try it, I would do it in another way. (假設(shè)的情況不大可能發(fā)生)要是我有機(jī)會試一試,我會用另一種方法做的。Even if they were to fail, theywouldnt lose courage. (說話人不希望假設(shè)的情況發(fā)生)即使他們?nèi)f一失敗,他們也不會泄氣。 熟悉并掌握好下面的基本句式:條件從句主句 與現(xiàn)在事實相違背過去式(動詞是BE 用 were) Should / would + 動詞原形與過去事實相違背h

18、ad + 過去分詞would / should+ have +過去分詞與未來事實相違背1) should + 動詞原形2) were + 動詞不定式3) 過去式(動詞是BE 也可以用were)would / Should + 動詞原形1. 省略 If 的幾種情況1)當(dāng)條件狀語從句的謂語部分含有had、should、或were時,就將這樣的詞had、should、或were搬到句首把句子寫成倒裝句而將連詞if 省略。 例如: If you were the manager here, what wouldyou do? Were you the manager here, what would

19、you do? 你若是這里的經(jīng)理,你會怎么辦?Ifhe should act like that again, he would be fired immediately. Should he act like that again, he would be fired immediately. 要是他再那樣做,他會被立即解雇的。2) 由某些介詞短語取代了 if 引導(dǎo)的條件狀語從句。例如:Without air, there would be no life on the earth. 要是沒有空氣,地球上就不會有生命了。But for your help, the little boy wo

20、uld have been drowned. 要是沒有你們的幫助,那個小男孩早就淹死了。We could have done the work better in that case.要是那樣的話,我們本可以把工作干得更好一些的。3) 由上下文的交代而省略了if 引導(dǎo)的條件狀語從句。在這種情況下,上下文事實上就是一個表示違背事實的條件句。上下文如果是由一個句子介紹的,那么這個取代了if 條件狀語從句的句子應(yīng)該用直陳語氣;而起主句作用的句子則要用虛擬語氣。例如:He would have come to see you earlier but he just cameback from his

21、business trip . (本句中的上下文是:but he just came back from his business trip ,表示:要是他在家沒出差的話)他本來早就來看你了,可他卻出差剛剛回來。But that youhelped me, I would have failed in the experiment. (本句中的上下文是:But that you helped me ,表示:要不是有你幫助我)要沒有你幫助我,我的試驗本做不成功的。2. 虛擬語氣用于某些從句中的情況:1)在主語從句中在It + be +形容詞/名詞+ that從句的結(jié)構(gòu)中,由于某些形容詞/名詞的原

22、因,that從句中的謂語動詞要用虛擬式should +動詞原形或是動詞原形。這類形容詞/名詞常見的有:essential (絕對必要的),important (重要的),advisable (明智的),desirable (希望能夠的),imperative (必須的),natural (自然的),necessary必 要的),regretful (遺憾的),strange (奇怪的),proper (適當(dāng)?shù)模?,urgent (緊急的),duty (義 務(wù)、責(zé)任),a pity (遺憾),no wonder (難怪),a regret (遺憾),例如:It is strange that he

23、 ( should ) say so .他居然會這樣說,真是奇怪。It is a great pity that you ( should ) think so . 他居然會這樣想,真是一件憾事。It is natural that a bird ( should ) rest in trees . 鳥在樹上安歇是很自然的。It is necessary that he be sent to Beijing right away. 有必要立即派他去北京。另外,下列結(jié)構(gòu)中主語從句的謂語動詞也要求用虛擬語氣:It is ordered that(根據(jù)命令、要求),It is proposed th

24、at (人們建議)It is desired that (最好、需要 ),It isrequested that (人們要求 )It is suggested that (有人建議 ),It is recommendedthat (有人推薦 )It is demanded that (根據(jù)要求 ),It is decided that (已經(jīng)決 定)It is arranged that (已經(jīng)安排 )等等。例如: It is ordered that all the troops(should) withdraw three miles away. 根據(jù)命令,所有部隊撤至三英哩以外。It i

25、s arranged thathe leave for Canada on Friday. 照安排, 他星期五動身去加拿大。It is suggested that the Englishevening be held on Saturday. 有人建議,英語晚會周六舉行。2)在賓語從句中某些動詞后面,賓語從句的謂語要求用虛擬式。賓語從句中的謂語動詞要用虛擬式should + 動詞原形或是 動詞原形 。 這類要求賓語從句的謂語用虛擬式的動詞,常見的有:command( 命令) , demand(要求),desire (希望),insist (堅持),order (命令),propose (提議

26、),recommend (推薦), request (要求),require (要求),suggest (建議), 等。例如: He proposed that we ( should ) set a dead line for the complement of the plan . 他提議擬定一個執(zhí)行計劃的期限。Theyrequested that we ( should ) send a delegation to their country. 他們請求我們派一個代表團(tuán)到他們國家去。I suggested that he ( should ) set off for our headqu

27、arters straightaway . 我建議他馬上動身去我們的總部。另外,wish和would rather / sooner that后面的賓語從句,其中謂語動詞的形式和對應(yīng)用法如下表所述:謂語動詞的形式用法過去式 表示當(dāng)時未能實現(xiàn)的愿望、意愿 過去完成式- 表示過去未能實現(xiàn)的愿望、意愿 過去未來式-表示未來不大可能實現(xiàn)的愿望,意愿 (注意下列例句:wish 自身的時態(tài)并不影響從句謂語動詞的形式。) Iwish that I knew something about programming. 我希望我懂一點程序設(shè)計就好了。I wishedthat I knew something ab

28、out programming. 我當(dāng)時希望我懂一點程序設(shè)計就好了。They wishthat they hadnt said it to us. 他們希望他們沒有對我們說過那件事。They wished that theyhadnt said it to us. 他們當(dāng)時希望他們沒有對我們說過那件事。I wish that you would getyounger and younger . 但愿你越來越年輕。The manager would rather that his secretary went tothe meeting instead of him . 經(jīng)理寧愿他的秘書代替他去

29、開會。He would sooner that he hadntborn until ten years ago . 他寧愿他十年以前才出身。3) 在表語從句和同位語從句中下面這些名詞的后面所接的表語從句和同位語從句中,謂語動詞要用虛擬式should + 動詞原形或是直接用動詞原形:idea (想法),suggestion (建議),motion (動議),proposal (提議), order (命令),recommendation (推薦),advice (建議),instruction (指示、指令)等等。例如: The instruction was that nobody be a

30、llowed to go to sleep until further orders. (表語從句)指示要求, 任何人不得在接到進(jìn)一步的命令之前去睡覺。My suggestion is that he leave for Londonat once . (表語從句)我的建議是他立即動身去倫敦。What do you think of his proposal thatwe ( should )put on a play at the English evening? (同位語從句)他建議我們在英語晚會上演 一個劇 ,你覺得怎么樣?4) 在狀語從句中在某些狀語從句中,要求謂語動詞要用虛擬式sho

31、uld +動詞原形或是動詞原形。以as if、as though (似乎,仿佛)引出的方式狀語從, 如果表示真實情況應(yīng)該用直陳語氣;如果表示非真實情況則應(yīng)該用虛擬語氣, 其謂語動詞的虛擬式與wish 后面賓語從句中謂語動詞的虛擬式相同。例如: He took his umbrella with himlest it rain. (目的狀語從句)他帶了雨傘,以防下雨。Ill keep a seat for you in case you shouldchange your mind. (目的狀語從句)我給你留個座,沒準(zhǔn)你會改變主意。They burned all theimportant doc

32、uments for fear that they fall into the enemys hands. (目的狀語從句)他們將所有的重要文件都燒毀了,以免它們落于敵人之手。Though everyone desert you, we will not .(讓步狀語從句,這是間或的用法。)即使所有的人拋棄了你,我們也不會。As long as avolume hold together, We dont care much about its outer appearance . (條件狀語從句,這是間或的用法。)只要一本書不拆開,外表怎么樣我們并不太在意。This, if the news

33、 be true, willmean a lot to us. (條件狀語從句,這是間或的用法。)如果這消息是真的,那對我們來說就太重要了。I can still remember the whole thing in great detail as though it were yesterday. (方式狀語從句)這一切我記憶猶新,仿佛就是昨天發(fā)生的事一樣。They are talking as if they hadbeen friends for years. (方式狀語從句)他們談話的那股親熱勁就如同是多年的老朋友似的。5)在It is (high) time that從句中在這個句

34、型中的that從句里,無論何時、何人稱,其謂語動詞都用過去式。這個句型表達(dá)的意思是 該是白時候了 。例如:It is time that wegot ready for the final examination. 該是我們?yōu)槠谀┛荚囎鳒?zhǔn)備的時候了。It is high time thatwe had our lunch. 該是我們吃午飯的時候了。It is time that he made up his mind. 該是他作出決定的時候了。6)在If only從句中If only從句表示一種愿望或是向往的假設(shè),其意義是要是就好了 、但愿。這個句型中的語序是正常語序,不倒裝。另外,其謂語動詞的虛擬式與wish 后面賓語從句中謂語動詞的虛擬式相同。例如:If only she couldunderstand my real feelings. 要是她能了解我的真實想法就好了。If only my mother hadsurvived the disease and lived till now. 要是我媽媽沒有死于疾病而活到現(xiàn)在就好了。If o

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