英語(yǔ)語(yǔ)法虛擬語(yǔ)氣講解
英語(yǔ)語(yǔ)法有詞類也有句型，我們現(xiàn)在來看看虛擬語(yǔ)氣的用法。下面是學(xué)習(xí)啦小編給大家整理的英語(yǔ)語(yǔ)法虛擬語(yǔ)氣講解，供大家參閱!
英語(yǔ)語(yǔ)法虛擬語(yǔ)氣講解：if only后的句子用虛擬語(yǔ)氣
if only 與 I wish一樣，也用于表示與事實(shí)相反的愿望，其后所虛擬語(yǔ)氣的時(shí)態(tài)與 wish 后所接時(shí)態(tài)的情況相同：
If only she had had more courage! 她再勇敢一些就好了。
If only it would stop raining! 雨要是停了就好了。
If only he didn't drive so fast. 但愿他車沒開得那么快。
If only I were [was] better looking. 要是我長(zhǎng)得漂亮些就好了。
If only I had listened to my parents! 我要是當(dāng)時(shí)聽了父母的話就好了。
If only she would go with me! 她要是愿意和我一道去就好了!
【友情提示】if only 通常獨(dú)立使用，沒有主句。
英語(yǔ)語(yǔ)法虛擬語(yǔ)氣講解：would rather后的句子用虛擬語(yǔ)氣
would rather后接句子時(shí)，句子謂語(yǔ)習(xí)慣上要用虛擬語(yǔ)氣，具體用法為：
1.一般過去時(shí)表示現(xiàn)在或?qū)淼脑竿?/p>
I'd rather you went tomorrow (now). 我寧愿你明天(現(xiàn)在)去。
I'd rather you came next Saturday. 我寧愿你下星期六來。
I'd rather you were happy. 我愿你快樂。
I'd rather she sat next to me. 我寧愿她挨著我坐。
I'd rather Jack left on an earlier train. 我寧愿杰克乘前一班火車走。
You always go without me and l'd rather you didn't. 你總是不帶我去，我可不愿意你這樣。
“Shall I open the window? ” “I'd rather you didn't. ”“我要不要把窗子打開? ” “我看不要打開好。”
2. 用過去完成時(shí)表過去的愿望
I'd rather you hadn't said it. 我真希望你沒有這樣說過。
I'd rather you hadn't done that. 我寧愿你沒這樣做。
l'd rather you had been / hadn't been present。我 (寧) 愿你當(dāng)時(shí)在場(chǎng) / 不在場(chǎng)。
l'd rather he had told / hadn't told me about it 我 (寧) 愿他告訴了 / 未告訴我這件事。
Katie went by car and I'd rather she hadn't. 凱蒂是坐汽車去的，我寧愿地不坐汽車去。
英語(yǔ)語(yǔ)法虛擬語(yǔ)氣講解：虛擬語(yǔ)氣用在條件狀語(yǔ)從句中
虛擬語(yǔ)氣是一種特殊的動(dòng)詞形式，表示所說的話不是一個(gè)事實(shí)，而只是一種假設(shè)，愿望，建議，懷疑，猜測(cè)或不大可能實(shí)現(xiàn)的空想。
I.虛擬語(yǔ)氣用在條件狀語(yǔ)從句中
虛擬語(yǔ)氣用在條件狀語(yǔ)從句中，通常從句由連詞if 引導(dǎo)。
1.與現(xiàn)在事實(shí)相反的虛擬條件句
條件狀語(yǔ)從句主句
If +主語(yǔ) +動(dòng)詞過去式主語(yǔ)+ would, should, could, might+原形動(dòng)詞
(be的過去式用were)
例如：
If I feared death, I wouldn't be a communist.
(劉胡蘭)怕死就不做共產(chǎn)黨員。
If there were no air, we couldn't live.
如果沒有空氣，我們就不能生活。
Example:
I would ask George to lend us the money if I ______ him.
A. had known B. knew C. have known D. know
I _____ it to him if I thought he would understand.
A. shall explain B. will explain C. would explain D. explain
2.與過去事實(shí)相反的虛擬條件句
構(gòu)成
條件狀語(yǔ)從句主句
If + 主語(yǔ) + 動(dòng)詞過去完成式主語(yǔ) + would, should, could, might+have + 過去分詞
例如：
If you had come a few minutes earlier, you would have met him.
如果你早來幾分鐘，你就會(huì)碰上他。
If there had been no air in the tube, the result of the experiment would have been more accurate.
如果試管中沒有空氣，實(shí)驗(yàn)結(jié)果就會(huì)更精確。
Example:
If you hadn't gone with Tom to the party last night, _______.
A. you would meet John already
B. you won't have missed John
C. you will have met John
D. you would have met John
3.與將來事實(shí)相反的虛擬條件句
構(gòu)成
條件狀語(yǔ)從句主句
If + 主語(yǔ)+ should +原形動(dòng)詞主語(yǔ)+would,should,could,might或were+不定式+原形動(dòng)詞
例如：
If he were to come tomorrow, things would be easier.
假如他明天會(huì)來，事情就容易辦了。
If the sand should be broken up, it would give out much energy.
如果沙子能被分解，它會(huì)釋放出大量的能量。
注：在表示與將來事實(shí)相反的虛擬條件句中，從句中的should有時(shí)可以省略。如：
If he make the design, he might do it in some other way.
要是他來搞這個(gè)設(shè)計(jì)，他可能用另外的方法設(shè)計(jì)。
Example:
If the sea ____ to rise 50 feet, India would become an island.
A. will B. is C. was D. were
If you ____ to see Mary, what would you tell her?
A. are B. will be going C. must D. were
We might still catch the train if we ___.
A. make hurry B. haste
C. make haste D. hastily
4.錯(cuò)綜時(shí)間的虛擬語(yǔ)氣
在一些含有虛擬語(yǔ)氣的句子中，如果主句與從句的謂語(yǔ)表示不同的時(shí)間，虛擬語(yǔ)氣可有不同形式，即主句與從句各自按自己的時(shí)間構(gòu)成虛擬形式。例如：
If I had met him before, I could recognize him.要是我以前遇見過他，我就能認(rèn)出他了。
(從句表示與過去事實(shí)相反，主句表示與現(xiàn)在或?qū)硎聦?shí)相反)
If we were driving at a speed of 100 Li an hour, we would have arrived there 2 hours ago. 如果我們的行車速度每小時(shí)100里，兩小時(shí)以前我們就會(huì)到達(dá)那里了。
(從句與現(xiàn)在事實(shí)相反，主句與過去事實(shí)相反)
Example:
If you _____ that late movie last night, you wouldn't be sleepy.
A. haven't watched
B. didn't watch
C. hadn't watched
D. wouldn't have watched
5.省略連詞if
在條件狀語(yǔ)從句中，如果有were, should, had，可以把連詞if 省去，把 were, should, had 放在句首，構(gòu)成條件意義。例如：
Should it rain tomorrow, what would you do? 萬一明天下雨，你怎么辦?
Were there no friction, we could not walk. 要是沒有摩擦力，我們就不能行走。
Had we known about the new method, we should have applied it earlier.
如果我們過去知道這種新方法，我們?cè)缇蛻?yīng)用了。
Example:
Had Alice been more hardworking, she _______.
A. had not failed B. would not fail
C. could not be failed D. would not have failed
_______ today, he would get there by Friday.
A. Would he leave B. Was he leaving
C. Were he to leave D. If he leaves
______ difficulties, we would be successful.
A. Should we overcome B. Would we overcome
C. Might we overcome D. Could we overcome
6.虛擬結(jié)構(gòu)中省略主句或從句
虛擬結(jié)構(gòu)中有時(shí)可省去主句或從句，并不影響意義的完整。
(1)省去條件從句
That would be fine. 那太好了。(省去了if you would come 或類似條件)
I wouldn't pass up the chance to visit China. 我不會(huì)放棄訪問中國(guó)的機(jī)會(huì)。
We might have produced more coal. 我們可能生產(chǎn)出更多煤炭。
注：省略條件句，在試題中很少見到。
(2)省去主句，常用以表示愿望。從句謂語(yǔ)多用過去時(shí)或過去完成時(shí)。
If only she were here. 假如她在這兒該多好啊!
If only he lived! 假如他活著該多好啊!
If only I had known it before. 如果我早先知道這件事，那就好了。
Example:
If only it _____! but it is too late.
A. is avoided B. has avoided
C. could be avoided D. can be avoided
If only everything _____ out as we wanted it to in life!
A. is working B. worked
C. works D. has worked
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