英語(yǔ)虛擬語(yǔ)氣用法總結(jié)？ .那么，英語(yǔ)虛擬語(yǔ)氣用法總結(jié)？一起來(lái)了解一下吧。
一、虛擬條件句： 1）假設(shè)的事與現(xiàn)在事實(shí)相反：If 主語(yǔ)+過去時(shí)（be動(dòng)詞一律用were），主語(yǔ)+ would （could/might/should）+動(dòng)詞原形 2)假設(shè)的事與過去事實(shí)相反：If 主語(yǔ)+had+過去分詞，主語(yǔ)+ would （could/should/might）+have done 3）假設(shè)的事與將來(lái)事實(shí)相反：If 主語(yǔ)+過去時(shí)/should do/were to do，主語(yǔ)+ would （could/should互龔皋夾薤蝗鴿偉龔連47;might）+動(dòng)詞原形 注意：1）if從句中絕對(duì)不可出現(xiàn)would 2）在條件句中如果出現(xiàn)were,had,should,would,可省去if，將主語(yǔ)與這些詞倒裝 二、名詞性虛擬語(yǔ)氣 1.在表示命令、建議、要求、驚嘆時(shí)的名詞性從句中需用虛擬語(yǔ)氣，基本句型：主語(yǔ)+（should）+動(dòng)詞原形（suggest、order、demand、propose、command、request、desire、insist） 2.It is desired/ suggested/ requested/ ordered/ proposed/ required +that +虛擬（should） 3.suggestion、proposal、order、plan、idea等表示命令、建議、要求、驚嘆的名詞后用虛擬（should) 三、虛擬語(yǔ)氣的其他用語(yǔ) 1.It is necessary/ important/ strange/ natural/ a pity/ a shame/ no wonder + that + (should)+ 動(dòng)詞原形/ have done 注意：在這種句子中絕不出現(xiàn)“would”“must”“could”等 2.wish后的賓語(yǔ)從句 與現(xiàn)在愿望不一致：主語(yǔ)+過去時(shí) 與過去愿望不一致：主語(yǔ)+had + 過去分詞 與未來(lái)愿望不一致：主語(yǔ)+ would （could/ might）+ 原形 3.It's time 句型 當(dāng) It's （high）time 后用that從句時(shí)應(yīng)為：主語(yǔ)+should +原形；或 主語(yǔ)+過去時(shí)（更常用） 4.If only引起的感嘆句相當(dāng)于“How I wish+ 賓從”（用法與wish一致） 5.would rather 引導(dǎo)的句子表示過去的情況用過去完成時(shí)，表示現(xiàn)在或?qū)?lái)的情況用過去時(shí) 6.as if / as though 引導(dǎo)的句子，表示過去的情況用過去完成時(shí)，表示現(xiàn)在與將來(lái)的情況用過去時(shí) 7..without、but、but for、otherwise 引導(dǎo)的短語(yǔ)或句子常暗含著含蓄條件（would do/ would have done） 8.錯(cuò)綜復(fù)雜句 根據(jù)句中的時(shí)間狀語(yǔ)，有時(shí)可能出現(xiàn)“混合虛擬”的情況，即主句可能是現(xiàn)在的情況，條件句也許是發(fā)生在過去的情況，反之也如此。
一、概念
中文譯作"虛擬語(yǔ)氣"。它是一種動(dòng)詞形式，表示說(shuō)話人的某種假設(shè)、愿望、懷疑、猜測(cè)、建議等含義。
二、語(yǔ)法結(jié)構(gòu)
1.if結(jié)構(gòu)（非真實(shí)條件句——表示的是假設(shè)的或?qū)嶋H可能性不大的情況）
與..事實(shí)相反 If從句 主句
過去 Had done Would* have done
現(xiàn)在 Were/did Would* do
將來(lái) Should do/were/were to do Would* do
例句：If there hadn’t been much rain in spring, we would have had a good harvest now. [過去]
If he smoked less, his cough might be well soon. [現(xiàn)在]
If the lecturer should be late, you would have to make a speech first. [將來(lái)]
備注：
（1）上表中’*’，would都可轉(zhuǎn)換為should、could、might。
（2) 如果為時(shí)間錯(cuò)綜句的話，左右兩欄可互相搭配，排列組合。
例句：
He would still be alive today if he hadn’t taken that drug.
[與現(xiàn)在事實(shí)相反] [與過去事實(shí)相反]
(3) if可轉(zhuǎn)換為其他形式
例句：Without your advice, our meeting wouldn’t have been so successfully. [過去]
（=>可轉(zhuǎn)換為：If there hadn’t been your advice, we …）
Your notes are almost illegible (難以辨認(rèn)的). Notes typed out would be a lot easier to read. [將來(lái)]
(=> 可轉(zhuǎn)換為：If the notes had been typed out, it would be a lot easier to read.)
I should have gone to see Dr. Smith and he might have cured me of the disease.[過去]
(=> 可轉(zhuǎn)換為：If he have gone to see Dr. Smith, he ..)
2、wish結(jié)構(gòu)
與..事實(shí)相反
過去 Had done
現(xiàn)在 Were/did
將來(lái) Would
備注：可轉(zhuǎn)換為其他形式。
例句：He talks as if (好像) he had done all the work himself. [過去]
I wish I were a bird.
I wish he handn' done that.
I wish I would be rich in the future.
3、should結(jié)構(gòu)
從句中用“should + 動(dòng)詞原形”構(gòu)成。而且should可以省去。用于此結(jié)構(gòu)的動(dòng)詞有：advise, direct, agree, ask, demand, decide, desire, insist, order, prefer, propose, request, suggest,intend等。
例句：The teacher suggest he (should) read English aloud.
注意：當(dāng)insist表示“堅(jiān)持認(rèn)為”、suggest表示“表明，顯示”時(shí)，不用虛擬語(yǔ)氣。
例句：The look on his face suggested that he was quite satisfied with what I had done for him.
He insisted that he was honest.
4、would rather ＋從句
在這種結(jié)構(gòu)中，從句的謂語(yǔ)動(dòng)詞用過去形式表示虛擬。
例句：I would rather you did this instead of me.
5、主語(yǔ)從句中的虛擬語(yǔ)氣
1）It be + 形容詞 + that ．．．（should）．．．
用于該句型的形容詞是：necessary, good, important, right, wrong, better, natural, proper, funny,
strange, surprising ．
一些名詞也可以用于 在該結(jié)構(gòu)中。如：a pity， no wonder．．．．
2）It be + 過去分詞 + that ．．．（should）．．．．
用于該結(jié)構(gòu)中的過去分詞是表示“建議、請(qǐng)求、命令”等詞的過去分詞。如：desired， suggested， requested，
ordered， proposed等。
3）It is time（about time， high time）that ．．．（過去式動(dòng)詞形式或should＋動(dòng)詞原形）．．．．
It is high time I went home now. = It is high time I should go home now.
6、表語(yǔ)從句、同位語(yǔ)從句中的虛擬語(yǔ)氣
在suggestion， proposal， order， plan， idea， advice， decision等需要有內(nèi)涵的名詞后面的表語(yǔ)從句、同
位語(yǔ)從句中，要使用虛擬語(yǔ)氣。其謂語(yǔ)動(dòng)詞應(yīng)用：should＋原形動(dòng)詞。另外連接從句的that不能省
略。
例：My suggestion is that we should go there at once.
What do you think of his proposal that we should put on a play at the English evening?
三、使用范圍及判斷
1、虛擬語(yǔ)氣表示一種不能實(shí)現(xiàn)的假設(shè)。該語(yǔ)法主要用于if條件狀語(yǔ)從句。也可用于主語(yǔ)從句、表語(yǔ)從句、賓語(yǔ)從句等。
2、if條件狀語(yǔ)從句中虛擬語(yǔ)氣的判斷
判斷是真實(shí)條件句還是非真實(shí)條件句。只有在非真實(shí)條件句中才使用虛擬語(yǔ)氣。通過句子意思，看假設(shè)的條件是否能夠?qū)崿F(xiàn)，能夠?qū)崿F(xiàn)是真實(shí)條件句，不能使用虛擬語(yǔ)氣；假設(shè)的條件不能實(shí)現(xiàn)則是非真實(shí)條件句，要用虛擬語(yǔ)氣。
判斷這個(gè)假設(shè)是與哪個(gè)事實(shí)相反。通常有三種情況：①與過去事實(shí)相反。②與現(xiàn)在事實(shí)相反。③與將來(lái)事實(shí)可能相反。
3、“后退一步法”
后退一步法是指在準(zhǔn)確地判斷了該句與哪一事實(shí)相反后，按虛擬語(yǔ)氣的后退一步法處理從句謂語(yǔ)動(dòng)詞的時(shí)態(tài)。即：在非 真實(shí)條件狀語(yǔ)從句中，謂語(yǔ)動(dòng)詞按正常情況“后退一步”。也就是：
1）與過去事實(shí)相反，在從句中用過去完成時(shí)形式表示。
2）與現(xiàn)在事實(shí)相反，在從句中用過去一般時(shí)形式表示。
3）與將來(lái)事實(shí)可能相反，在從句中用過去將來(lái)時(shí)形式表示。
主句中則用情態(tài)動(dòng)詞would, should, could 等加一個(gè)與從句一致的動(dòng)詞形式。
例：If I had come her yesterday, I would have seen him.
If I were a teacher, I would be strict with my students.
If it should snow tomorrow, they couldn’t go out.
四、注意事項(xiàng)
1.if條件句中如有were, should, had，可以省去if，并使用倒裝語(yǔ)序。
2、在現(xiàn)代英語(yǔ)中if條件狀與從句中的謂語(yǔ)動(dòng)詞如果是be其過去形式一般用were。
3、wish 后面賓語(yǔ)從句中的虛擬語(yǔ)氣，按“后退一步法”處理從句的謂語(yǔ)動(dòng)詞。注意：與哪個(gè)事實(shí)相反，不能以主句的時(shí)態(tài)為判斷依據(jù)，而是根據(jù)從句的意義判斷。
1） 虛擬語(yǔ)氣概念
虛擬語(yǔ)氣用來(lái)表示說(shuō)話人的主觀愿望或假想，而不表示客觀存在的事實(shí)，所說(shuō)的是一個(gè)條件，不一定是事實(shí)，或與事實(shí)相反。虛擬語(yǔ)氣通過謂語(yǔ)動(dòng)詞的特殊形式來(lái)表示。虛擬語(yǔ)氣常在表示條件和結(jié)果的狀語(yǔ)從句中。在表示與事實(shí)相反的虛擬語(yǔ)氣時(shí)動(dòng)詞有三種時(shí)態(tài)：現(xiàn)在時(shí)，過去時(shí)，將來(lái)時(shí)。
2） 在條件句中的應(yīng)用
條件句可分為兩類，一類為真實(shí)條件句，一類為非真實(shí)條件句。非真實(shí)條件句表示的是假設(shè)的或?qū)嶋H可能性不大的情況，故采用虛擬語(yǔ)氣。
常見虛擬語(yǔ)氣用法
1、真實(shí)條件狀語(yǔ)從句與非真實(shí)條件狀語(yǔ)從句
eg .
If he doesn’t hurry up, he will miss the bus. ( 真實(shí)條件狀語(yǔ))（不是虛擬語(yǔ)氣）
If he was free, he would ask me to tell stories. （真實(shí)條件狀語(yǔ)）（不是虛擬語(yǔ)氣）
If I were you, I would go at once. （非真實(shí)條件狀語(yǔ)從句）
If there were no air, people would die. （非真實(shí)條件狀語(yǔ)從句）
總結(jié)就是 四個(gè)字：主將從現(xiàn)，主句用將來(lái)時(shí)，從句用一般現(xiàn)在時(shí)。
2、虛擬語(yǔ)氣在非真實(shí)條件狀語(yǔ)從句中的用法及動(dòng)詞形式
① 表示與現(xiàn)在事實(shí)相反的情況
eg.
If I were you, I would take an umbrella.如果我是你，我會(huì)帶把傘。（事實(shí)：我不可能是你）
If I knew his telephone number, I would tell you. 如果我知道他的電話號(hào)碼，我就會(huì)告訴你。（事實(shí)：不知道）
If there were no air or water, there would be no living things on the earth. 如果沒有水和空氣，地球上就不會(huì)有生物。(事實(shí)：地球上既有空氣也有水)
If I had any money with me, I could lend you some. 如果我?guī)уX了，我就會(huì)借給你些。（事實(shí)：沒帶錢）
If he studied harder, he might pass the exam.如果他再努力些，就能通過考試了。（事實(shí)：學(xué)習(xí)不用功）
②表示與過去事實(shí)相反的情況
eg. If I had got there earlier, I should/could have met her. 如果我早到那兒，我就會(huì)見到她。（事實(shí)：去晚了）
If he had taken my advice, he would not have made such a mistake. 如果他聽我的勸告的話，就不會(huì)犯這樣的錯(cuò)誤了。（事實(shí)：沒有聽我的話）
③表示對(duì)將來(lái)情況的主觀推測(cè)（可能相反或可能性很小）
eg.If he would come here tomorrow, I should/would talk to him. 如果他哪天來(lái)這兒的話，我就跟他談?wù)劇＃ㄊ聦?shí)：來(lái)的可能性很小）
If there were a heavy snow next Sunday, we would not go skating. 如果下周日下大雪，我們就不能去滑冰了。（事實(shí)：不知能否下雪）
If she were to be there next Monday, I would tell her about the matter. 如果她下周一來(lái)這兒的話，我就會(huì)告訴她這件事得始末。
在表示建議、命令、要求等含義的賓語(yǔ)從句，謂語(yǔ)動(dòng)詞常用虛擬語(yǔ)氣，"should＋動(dòng)詞原形"構(gòu)成，should 可省略。
一.概念: 動(dòng)詞虛擬語(yǔ)氣表示說(shuō)話人的愿望, 假設(shè), 猜測(cè), 建議, 請(qǐng)求, 意圖, 設(shè)想等未能或不可能成為事實(shí)的情況, 或者在說(shuō)話人看來(lái)實(shí)現(xiàn)可能性很小的情況, 而不表示客觀存在的現(xiàn)實(shí)
二.虛擬語(yǔ)氣的表現(xiàn)形式: 通過句中謂語(yǔ)動(dòng)詞的特殊形式來(lái)表現(xiàn). 這些特殊形式與謂語(yǔ)動(dòng)詞的某些時(shí)態(tài)相同, 但它們只表示語(yǔ)氣, 而不表示時(shí)態(tài), 但含有一定的時(shí)間概念
虛擬語(yǔ)氣的用法
一.虛擬語(yǔ)氣在簡(jiǎn)單句中的用法: 謂語(yǔ)動(dòng)詞用原形或may +動(dòng)詞原形
1.表示祝愿
a. Long live our country.
b. May you succeed.
c. May you be happy all your life.
2.表示命令
a. Everybody leave the room.
二.虛擬語(yǔ)氣在非真實(shí)條件句中的用法: (使用虛擬語(yǔ)氣的含條件句的復(fù)合句稱為真實(shí)條件句)
1.表示與現(xiàn)在事實(shí)相反的情況時(shí), if從句的謂語(yǔ)用動(dòng)詞的過去式 (be動(dòng)詞的過去式多用were, 而不用was), 主句的謂語(yǔ)用should / would / could / might +動(dòng)詞原形 (should多用于第一人稱, would多用于二三人稱, could / might可用于所有人稱)
a. If I had more time, I should study computer better.
b. If he were not so busy, she would attend the meeting this afternoon.
c. If they didn’t take exercises every day, they wouldn’t be so healthy.
d. If you went to bed earlier, you would not be so sleepy in the morning.
e. If she invited me, I should go to the party.
2.表示與過去事實(shí)相反的情況時(shí), if從句的謂語(yǔ)用had done形式, 主句的謂語(yǔ)用should / would / could / might + have done的形式
a. If she had invited me yesterday, I should have gone to the party.
b. I would have checked my paper again if I had had more time at yesterday’s exam.
c. If you had taken the teacher’s advice, you would not have failed in the exam.
3.表示與將來(lái)事實(shí)相反的情況時(shí), if從句的謂語(yǔ)形式是: ①.完全動(dòng)詞過去式 (be的過去式通常用were); ②.should +動(dòng)詞原形; ③.were to do. 其中②, ③種情況都含有出乎意料之外之意; 主句的謂語(yǔ)的形式是: should / would / could / might +動(dòng)詞原形
a. If she should invite me tomorrow, I should go to the party.
b. If it rained / should rain / were to rain tomorrow, our picnic would be put off.
c. If I saw him tomorrow, I would pass your note to him.
d. I might come back if I were to miss the train.
三.虛擬語(yǔ)氣在非真實(shí)條件句中用法的幾個(gè)變體:
1.條件從句省略if: 在書面語(yǔ)中, 如果條件從句中的謂語(yǔ)中有were, had, should等詞, 可將if省略, 而把were, had, should放在句首
a. Were I you (=If I were you ), I would get up early very early.
b. Had you arrived (=If you had arrived ) at the station ten minutes earlier yesterday, you could have caught the train.
2.省略條件從句或主句, 省略部分的含義仍有所體現(xiàn). 省略主句時(shí), 表示己不能實(shí)現(xiàn)的愿望
a. You could have done it yourself (if you had wanted to).
b. I wouldn’t smoke (if I were you).
c. If my old friends were with me! (要是老朋友和我在一起該多好啊)
d. If you could have seen the wonderful film!
3.主從句時(shí)間不一致時(shí), 主從句謂語(yǔ)動(dòng)詞的形式取決于要表示的具體時(shí)間
a. You would speak English well if you had practised speaking it every day.
b. If she hadn’t trained so hard, she wouldn’t be able to run so fast.
4.假設(shè)的條件不以條件從句, 而以其他方式如介詞短語(yǔ)、從句等表達(dá)出來(lái), 這種句子稱為含蓄條件句
a. What would you do with a million dollars?
b. Without music, the world would be a dull place.
c. We could have done better with more money.
d. He would have given you more help, but he has been so busy.
四.虛擬語(yǔ)氣在as if / though從句中的用法:
1.表示與現(xiàn)在事實(shí)相反或?qū)ο嘣谇闆r有所懷疑, as if / though從句謂語(yǔ)用過去式
a. He speaks English so well as if she had studied English in England.
b. She looked as if she were ill.
2.表示與過去事實(shí)相反的情況, as if / though從句謂語(yǔ)用過去完成式
a. The machines operated as if it had been repaired.
五.虛擬語(yǔ)氣在含even if / though從句的復(fù)合句中的用法:
在此類復(fù)合句中, 若表示與事實(shí)相反, 可用虛擬語(yǔ)氣形式. 主從句的謂語(yǔ)動(dòng)詞形式與非真實(shí)條件句相同
a. Even if I were rich, I would work.
六.虛擬語(yǔ)氣在主語(yǔ)從句中的用法:
如果表示說(shuō)話人的看法, 想法或意見, 在句型 It is / was + adj. + that從句中, 主語(yǔ)從句中可用虛擬語(yǔ)氣. 主語(yǔ)從句中謂語(yǔ)動(dòng)詞用should do表示現(xiàn)在或?qū)?lái)情況, 用should have done表示過去情況
a. It is necessary that you should clean the lab before you left.
b. It is important that you should take the doctor’s advice.
c. It was very strange that he should have left without say goodbye.
七.虛擬語(yǔ)氣在賓語(yǔ)從句中的用法:
1.在wish的賓語(yǔ)從句中, 通常表示不可能實(shí)現(xiàn)或沒有實(shí)現(xiàn)的愿望, 常用虛擬語(yǔ)氣
①.wish的賓語(yǔ)從句用過去式, 表示現(xiàn)在或?qū)?lái)沒有實(shí)現(xiàn)或不可能實(shí)現(xiàn)的愿望
a. I wish I knew the result of the match now.
b. I wish it were spring here all the year round.
c. I wish I could help you.
d. I wish I were young.
②.wish的賓語(yǔ)從句用過去完成式, 表示過去沒有實(shí)現(xiàn)或不可能實(shí)現(xiàn)的愿望
a. We wish we had got the film tickets last night.
b. I wish you I had met him yesterday.
③.wish的賓語(yǔ)從句若用would, 則一般表示請(qǐng)求, 對(duì)現(xiàn)狀不滿或希望未來(lái)有所改變
a. I wish the prices would come down.
b. I wish you would help me.
c. I wish he would be more careful.
d. We wish you would spend the holiday with us.
2.在動(dòng)詞suggest (建議), advise (建議), demand (要求), require (要求), order (命令), insist (堅(jiān)持)后的賓語(yǔ)從句中, 謂語(yǔ)動(dòng)詞常用( should )+動(dòng)詞原形的虛擬語(yǔ)氣形式
a. I suggested that we should go there at once.
b. I demand that he should answer me at once.
c. The doctor insisted that the patient should stay in bed for two weeks.
d. The officer ordered that the soldiers should stop playing.
與名詞suggestion建議 / advice 建議 / demand要求 / request要求 / order命令有關(guān)的從句(包括同位語(yǔ)從句和表語(yǔ)從句等)中的謂語(yǔ)也用 ( should ) +動(dòng)詞原形
a. The black people made a strong demand that the government ( should ) take steps to change the unfair situation.
b. Their demand is that the government should take steps to change the unfair situation.
c. I was Bill’s suggestion that everybody should have a map.
d. His suggestion was that everybody should have a map.
八.虛擬語(yǔ)氣用在句型: It is time that(該做某事了)中: that從句中的謂語(yǔ)動(dòng)詞用過去式
a. It is time we got up.
九.虛擬語(yǔ)氣用在if only引導(dǎo)的感嘆句中: 表示但愿, 要是就好了, 其中謂語(yǔ)形式與wish的賓語(yǔ)從句相同
a. If only he didn’t drive so fast! ( =I wish he didn’t drive so fast.)
b. If only he had taken the doctor’s advice. ( =I wish he had taken the doctor’s advice.)
c. If only the rain would stop! ( =I wish the rain would stop.)
十.虛擬語(yǔ)氣用在would rather / prefer后的that從句中: 表示現(xiàn)在或?qū)?lái)情況謂語(yǔ)動(dòng)詞用過去時(shí)形式, 表示過去情況動(dòng)詞用過去完成時(shí)形式
a. I would rather he came next Saturday.
b. I would prefer you had seen the film yesterday.
c. I would rather that he painted the house blue
主語(yǔ)從句中的虛擬語(yǔ)氣主要取決于某些形容詞和過去分詞，用來(lái)表示建議、命令、要求、驚異和失望等。其形式為：(should)+動(dòng)詞原形。表語(yǔ)從句和同位語(yǔ)從句中的虛擬語(yǔ)氣在表示建議、命令、主張、目的和愿望等名詞后面的表語(yǔ)從句和同位語(yǔ)從句中謂語(yǔ)動(dòng)詞要求使用虛擬語(yǔ)氣。其形式為：(should)+動(dòng)詞原形。賓語(yǔ)從句中的虛擬語(yǔ)氣，其形式為：(should)+動(dòng)詞原形。
虛擬語(yǔ)氣是英語(yǔ)語(yǔ)法里非常重要的知識(shí)點(diǎn)，虛擬語(yǔ)氣的用法主要有主語(yǔ)從句里的虛擬語(yǔ)氣，表語(yǔ)從句里的虛擬語(yǔ)氣，賓語(yǔ)從句中的虛擬語(yǔ)氣，其中還包括混合虛擬語(yǔ)氣，含蓄虛擬語(yǔ)氣等。
某些動(dòng)詞后所接賓語(yǔ)從句中的謂語(yǔ)動(dòng)詞要求用虛擬語(yǔ)氣，用來(lái)表示建議、命令和要求等。其形式為：(should)+動(dòng)詞原形。在以it為形式賓語(yǔ)的復(fù)合賓語(yǔ)從句中也可以用虛擬語(yǔ)氣，其形式為：(should)+動(dòng)詞原形。這一句型中使用的形容詞(賓補(bǔ))與主語(yǔ)從句中的虛擬語(yǔ)氣所使用的形容詞相同。wish后面所跟的賓語(yǔ)從句中的虛擬語(yǔ)氣表示某種不能實(shí)現(xiàn)的愿望。
虛擬語(yǔ)氣中的“含蓄之美”指的是含蓄虛擬語(yǔ)氣。因?yàn)橛袝r(shí)假設(shè)的情況并不是以if引導(dǎo)的條件從句形式出現(xiàn)，而是通過一些短語(yǔ)等形式暗示虛擬語(yǔ)氣的存在，常用的詞語(yǔ)有with,?without,?but?for,?otherwise,?or，even,?in?case?of,?what?if(如果…將如何)等等，這種句子往往有主句而無(wú)從句?(考試時(shí)多數(shù)情況是對(duì)過去的假設(shè))。
表示與現(xiàn)在事實(shí)相反的情況，從句：If+主語(yǔ)+動(dòng)詞一般過去時(shí)(Be動(dòng)詞用were)，主句：主語(yǔ)+ should/would/might/could+do。表示與過去事實(shí)相反的情況，從句：If+主語(yǔ)+had+done，主句：主語(yǔ)+should/would/might/could+have done。表示與將來(lái)事實(shí)相反，從句：if+主語(yǔ)+were to do；if+主語(yǔ)+should+do；if+主語(yǔ)+動(dòng)詞一般過去式（be動(dòng)詞用were），主句：主語(yǔ)+should/would/might/could+do。
有時(shí)，虛擬條件句中，如果主句和從句的謂語(yǔ)動(dòng)作若不是同時(shí)發(fā)生時(shí)，虛擬語(yǔ)氣的形式應(yīng)作相應(yīng)的調(diào)整。這種條件句叫錯(cuò)綜條件句。 當(dāng)從句的謂語(yǔ)動(dòng)詞含有were，should，had時(shí)，if可以省略，這時(shí)從句要用倒裝語(yǔ)序，即把were，should，had等詞置于句首，這種多用于書面語(yǔ)。
非真實(shí)條件句中的條件從句有時(shí)不表達(dá)出來(lái)，只暗含在副詞、介詞短語(yǔ)、上下文或其他方式表示出來(lái)，這種句子叫做含蓄條件句，在多數(shù)情況下，條件會(huì)暗含在短語(yǔ)中，如without…，but for…（要不是因?yàn)?..）等。有時(shí)，虛擬條件語(yǔ)氣的從句中，主、從句可以省略其中的一個(gè)，來(lái)表示說(shuō)話人的一種強(qiáng)烈的感情。在虛擬語(yǔ)氣的從句中，動(dòng)詞be的過去時(shí)態(tài)一律用were，不用was。
以上就是英語(yǔ)虛擬語(yǔ)氣用法總結(jié)的全部?jī)?nèi)容。
