『壹』 高中英語語法虛擬語氣，求指教…
4.suggest 的虛擬語氣 當suggest的意思是 暗示，表明的時候是不需要用虛擬語氣的（初除此以外都需要），從句只需要用陳述語氣。這句話的意思是：他的話表明了他已經通過了這個測試。而通過測試這件事是比這個暗示發生的早，且不用虛擬語氣，所以要過過去完成時（注意suggest是過去式）
5.句中有order所以要用虛擬語氣 物資被送過去，所以用被動
以上兩種情況我幫你整理一下：用於表示要求，命令，建議，意圖，決定，推薦的動詞或它們的名詞形式都需要用虛擬語氣。幫你列幾個常用的：suggest,order,command,advice,propose,request,insist,recommend,demand,require
其中suggest意思為表明，暗示時不用虛擬語氣；insist表示「堅持認為，堅持說」時不用虛擬語氣（表示堅持做某事用虛擬語氣）
6.這里考察would rather 的虛擬語氣
現在/將來要做的事 謂語用一般過去時
過去的動作 謂語用過去完成時
句中for the time being 意思是就目前而言 表示現在 所以謂語用一般過去時
7.考察if 的虛擬語氣 有三種情況 我用一個簡易表格 你可以看看
情況 if從句謂語動詞 if主句謂語動詞
與現在事實相反 were/did would/should/could/might do
與過去事實相反 had done woule/should/could/might have done
與將來事實相反 were to/should do/did 同現在
這一題 if從句是had done 形式，所以主句用would have done
8.看第四題
希望能幫到你，望採納。不懂還可以問我。
『貳』 高考英語虛擬語氣用法總結
一.概念: 動詞虛擬語氣表示說話人的願望, 假設, 猜測, 建議, 請求, 意圖, 設想等未能或不可能成為事實的情況, 或者在說話人看來實現可能性很小的情況, 而不表示客觀存在的現實
二.虛擬語氣的表現形式: 通過句中謂語動詞的特殊形式來表現. 這些特殊形式與謂語動詞的某些時態相同, 但它們只表示語氣, 而不表示時態, 但含有一定的時間概念
虛擬語氣的用法
一.虛擬語氣在簡單句中的用法: 謂語動詞用原形或may +動詞原形
1.表示祝願
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.虛擬語氣在非真實條件句中的用法: (使用虛擬語氣的含條件句的復合句稱為真實條件句)
1.表示與現在事實相反的情況時, if從句的謂語用動詞的過去式 (be動詞的過去式多用were, 而不用was), 主句的謂語用should / would / could / might +動詞原形 (should多用於第一人稱, would多用於二三人稱, could / might可用於所有人稱)
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.表示與過去事實相反的情況時, if從句的謂語用had done形式, 主句的謂語用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.表示與將來事實相反的情況時, if從句的謂語形式是: ①.完全動詞過去式 (be的過去式通常用were); ②.should +動詞原形; ③.were to do. 其中②, ③種情況都含有出乎意料之外之意; 主句的謂語的形式是: should / would / could / might +動詞原形
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.虛擬語氣在非真實條件句中用法的幾個變體:
1.條件從句省略if: 在書面語中, 如果條件從句中的謂語中有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. 省略主句時, 表示己不能實現的願望
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.主從句時間不一致時, 主從句謂語動詞的形式取決於要表示的具體時間
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.假設的條件不以條件從句, 而以其他方式如介詞短語、從句等表達出來, 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 ll 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.虛擬語氣在as if / though從句中的用法:
1.表示與現在事實相反或對相在情況有所懷疑, as if / though從句謂語用過去式
a. He speaks English so well as if she had studied English in England.
b. She looked as if she were ill.
2.表示與過去事實相反的情況, as if / though從句謂語用過去完成式
a. The machines operated as if it had been repaired.
五.虛擬語氣在含even if / though從句的復合句中的用法:
在此類復合句中, 若表示與事實相反, 可用虛擬語氣形式. 主從句的謂語動詞形式與非真實條件句相同
a. Even if I were rich, I would work.
六.虛擬語氣在主語從句中的用法:
如果表示說話人的看法, 想法或意見, 在句型 It is / was + adj. + that從句中, 主語從句中可用虛擬語氣. 主語從句中謂語動詞用should do表示現在或將來情況, 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.虛擬語氣在賓語從句中的用法:
1.在wish的賓語從句中, 通常表示不可能實現或沒有實現的願望, 常用虛擬語氣
①.wish的賓語從句用過去式, 表示現在或將來沒有實現或不可能實現的願望
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的賓語從句用過去完成式, 表示過去沒有實現或不可能實現的願望
a. We wish we had got the film tickets last night.
b. I wish you I had met him yesterday.
③.wish的賓語從句若用would, 則一般表示請求, 對現狀不滿或希望未來有所改變
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.在動詞suggest (建議), advise (建議), demand (要求), require (要求), order (命令), insist (堅持)後的賓語從句中, 謂語動詞常用( should )+動詞原形的虛擬語氣形式
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命令有關的從句(包括同位語從句和表語從句等)中的謂語也用 ( should ) +動詞原形
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.虛擬語氣用在句型: It is time that(該做某事了)中: that從句中的謂語動詞用過去式
a. It is time we got up.
九.虛擬語氣用在if only引導的感嘆句中: 表示但願, 要是就好了, 其中謂語形式與wish的賓語從句相同
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.虛擬語氣用在would rather / prefer後的that從句中: 表示現在或將來情況謂語動詞用過去時形式, 表示過去情況動詞用過去完成時形式
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
『叄』 高中英語語法虛擬語氣
He worked very hard, otherwise he [couldn't have passed] the entrance exam.
事件發生在過去，所以對過去虛擬。他學習非常努力，不然他不會通過入學考試專。（事實是屬當時他就通過了入學考試）
『肆』 高中虛擬語氣的用法（詳細）
一、 條件句中的虛擬語氣
1. 條件句中虛擬語氣的形式
從句中提出一種與客觀現實不相符或根本不可能存在的條件，主句會產生的一種不可能獲得的結果。條件句中的虛擬語氣根據不同的時間有三種不同的形式。
時間
從句謂語形式
主句謂語形式
將來
動詞過去式(be用were)
should + 動詞原形
were to + 動詞原形
would / should / might / could + 動詞原形
現在
動詞過去式(be 用 were)
would / should / might / could + 動詞原形
過去
had +動詞過去分詞
would / should / might / could have + 動詞過去分詞
2. 條件句中的虛擬語氣的舉例
(1) 將來時的條件句中的虛擬語氣。如：
If he should go to Qing Hua University, he would make full use of his time. 如果他要上清華大學的話，他就會充分利用他的時間了。
If he were to come here, he would tell us about it. 如果他要來的話，他會通知我們一聲。
(2) 現在時的條件句中的虛擬語氣。如：
If he were free, he would help us. 要是他有空的話，它會幫助我們的。
If he studied at this school, he would know you well. 如果他在這所學校學習的話，它會對你很熟悉。
(3) 過去時的條件句中的虛擬語氣。如：
If I had seen the film, I would have told you about it. 我如果看過這場電影，我會把電影內容告訴你了。
If I had got there earlier, I would have met Mr. Li. 如果我早點到那兒，我就會會到了李先生。
3. 運用條件句中的虛擬語氣時，須注意的幾個問題
(1) 當從句的主語為第三人稱單數時，謂語動詞若是系動詞be時，可用 was 代替 were。但在倒裝虛擬結構及 if I were you, as it were 中，只能用 were。如：
Were I ten years younger, I would study abroad. 要是我還年輕十歲的話，我會去國外學習。
If I were you, I would try my best to grasp the chance. 要是我是你的話，我要盡力抓住這次機會。
(2) 有時，虛擬條件句中，主、從句的動作若不是同時發生時，須區別對待。
①從句的動作與過去事實相反，而主句的動作與現在或現在正在發生的事實不符。如：
If I had worked hard at school, I would be an engineer, too. 如果我在學校學習刻苦的話，我現在也會使工程師了
If they had informed us, we would not come here now. 如果他們通知過我們的話，我們現在就不會來這里了。
②從句的動作與現在事實相反，而主句的動作與過去事實不符。如：
If he were free today, we would have sent him to Beijing. 如果他今天有空的話，我們會已經派他去北京了。
If he knew her, he would have greeted her. 要是他認識她的話，他肯定會去問候她了。
③從句的動作與過去發生的情況相反，而主句的動作與現在正在發生的情況相反。如：
If it had not been raining too much, the crops would be growing much better. 如果天不下太多的雨的話，莊家會長得更好。
If he had been working hard, he would be working in the office now. 要是他工作一直努力的話，他現在已進了辦公室了。
(3) 當虛擬條件句的謂語動詞含有 were, should, had 時，if 可省略，而將 were, should, had等詞置於句首。如：
Should he agree to go there, we would send him there. 要是他答應去的話，我們就派他去。
Were she here, she would agree with us. 如果她在這兒的話，她會同意我們的。
Had he learnt about computers, we would have hired him to work here. 如果她懂一些電腦知識的話，我們會已經聘用他來這里工作了(from www.yygrammar.com)。
(4) 有時，句子沒有直接給出假設情況的條件，而須通過上下文或其他方式來判斷。如：
I would have come to see you, but I was too busy. 我本該來看你了，然而我太忙了。
But for his help, we would be working now. 要不是他的幫助，我們還會在工作呢。
Without your instruction, I would not have made such great progress. 要是沒有你的指導，我不會取得如此大的進步。
(5) 有時，虛擬條件句中，主、從句可以省略其中的一個，來表示說話人的一種強烈的感情。
①省略從句
He would have finished it. 他本該完成了。
You could have passed this exam. 你應該會通過這次考試了。
②省略主句
If I were at home now. 要是我現在在家裡該多好啊。
If only I had got it. 要是我得到它了該多好啊。
二、其他狀語從句的虛擬語氣
1. 目的狀語從句中的虛擬語氣
(1) 在 for fear that, in case, lest 引導的目的狀語從句中，若用虛擬語氣時，從句謂語為： should + 動詞原形。並且 should 不能省略
She examined the door again for fear that a thief should come in. 她又把門檢查了一遍，以防盜賊的進入。
He started out earlier lest he should be late. 他很早就出發了以防遲到。
(2) 在 so that, in order that 所引導的目的狀語從句中，從句中的謂語為：can / may / could / might / will / would / should + 動詞原形。如(from www.yygrammar.com)：
He goes closer to the speaker so that he can hear him clearer. 他走近說話的人以便能挺得更清楚。
He read the letter carefully in order that he should not miss a word. 他把信讀得很仔細以便不漏掉一個單詞。
2. 讓步狀語從句中的虛擬語氣
(1) 在 even if, even though 所引導的讓步狀語從句中，可用虛擬語氣，主句、從句的結構與 if 所引導的條件從句結構相同。如：
Even if he were here himself, he should not know what to do. 即使他親自來也不知該怎麼辦。
Nobody could save him even though Hua Tuo should come here. 即使華佗在世也救不了他。
(2) 在whatever, whichever, whenever, whoever, wherever, however, no matter wh-word 等引導的讓步狀語從句中，從句虛擬語氣結構為：
① may +動詞原形(指現在或將來)。如：
We will finish it on time no matter what / whatever may happen. 不管發生什麼事，我們都要按時完成。
We will find him wherever / no matter where he may be. 無論他在哪裡，我們都要找到他。
I will wait for him no matter how late he may come. 不管他來的多麼晚，我都會等他。
② may +完成式(指過去) ，主句結構不限。如：
You mustn』t be proud whatever / no matter what great progress you may have made. 不管你取得了多麼大的進步，你也不能驕傲(from www.yygrammar.com)。
We must respect him no matter what / whatever mistakes he may have made. 不管他翻過什麼錯誤，我們必須尊敬他。
(3) 在though, although等引導的讓步狀語從句中，從句虛擬語氣結構為 should +動詞原形，主句結構不限。如：
Although / Though he should often be late, he is a good student. 盡管他經常遲到，他還是個好學生。
Although / Though he should be secretary, he must obey the rules. 盡管他是書記，他也必須遵守規定。
3. 方式狀語從句中的虛擬語氣
as if, as though 引導的方式狀語從句常用虛擬語氣。虛擬語氣的結構為：
表示所發生的時間
虛擬語氣結構
發生在主句動作之前
had + 過去分詞
與主句動作同時發生
過去時(be 用were )
發生在主句動作之後
would / could / might / should+原形動詞
例如：
They began to talk warmly as if they had known each other for long. 他們開始熱烈的談論起來就好像他們已相互認識很久了。
He coughed twice as if someone should come. 他咳嗽兩聲就好像有人要來了。
4. 原因狀語從句中的虛擬語氣
amazed, angry, annoyed, astonished, disappointed, frightened, happy, pleased, proud, sorry, surprised, upset 等後面的狀語從句中常用虛擬語氣。其虛擬語氣的結構為：
① should + 原形動詞(指現在或將來)。如：
He was angry that you should call him by name. 他很生氣，你竟然對他直呼其名。
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。
② should + 完成式, 指過去。如：
I』m very sorry that you should have failed the exam. 我很遺憾，你這次考試竟然失敗了。
I was very surprised that Father should have known what I did yesterday. 我很吃驚，父親竟指導我昨天所作的事情(from www.yygrammar.com)。
三、賓語從句中的虛擬語氣
1．英語中，如：advise, ask, demand, desire, decide, insist(堅決要求) , order, propose, request, suggest(建議) 表示請求、要求、命令或建議等意義的動詞所接的賓語從句一般用虛擬語氣，其虛擬語氣的結構為：(should) + 原形動詞。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鍾。
The Party asked that we should serve the people with our heart and soul. 黨要求我們要全心全意地為人民服務。
但是，當insist的意思為：堅決認為，堅持說；suggest的意思為：表明，暗含，暗示等時，賓語從句一般不用虛擬語氣。如：
Tom insisted that he hadn』t stolen the watch. 湯姆堅持說他沒有偷那塊手錶。
His smile suggested that he had succeeded in this exam. 他的微笑表明他在考試中成功了。
2. believe, expect, suspect, think, imagine 等動詞的否定句或疑問句中的賓語從句常用虛擬語氣。其虛擬語氣的結構為：should + 原形動詞。如：
Can you believe that he should kill a tiger? 你能相信他竟殺死了一隻老虎？
Can you imagine that he should take the first place in the long jump contest? 你能想像得到他在跳遠比賽中竟獲得了第一名？
3. 英語中，wish 之後的賓語從句，表示一種沒有實現或根本不可能實現的願望，常用虛擬語氣。其虛擬語氣的結構為(from www.yygrammar.com)：
表示所發生的時間
虛擬語氣結構
發生在主句動作之前
(1)had + 過去分詞；
(2)would / could / might / should + have + 過去分詞
與主句動作同時發生
過去時(be 用were )
發生在主句動作之後
would / could / might / should + 原形動詞
例如：
I wish I learnt English well. 我希望我已學好了英語。
I wish I had been there with them last week. 我希望上周跟他們一起在那兒。
He wishes we could go and play games with him. 他希望我們能去跟他做游戲。
4. 英語中，would rather, had rather, would sooner等之後的賓語從句常表示與客觀事實不相符的一種願望，故使用虛擬語氣。其虛擬語氣的結構為：
表示所發生的時間
虛擬語氣結構
過去
had + 過去分詞；
現在
過去時(be 用were )
將來
過去時(be 用were )
例如：
I』d rather you had seen the film yesterday. 我倒想你昨天看過了這場電影。
I』d rather you were here now. 我倒想你現在在這兒。
We』d rather you went here tomorrow. 我么倒想你明天去那兒。
四、主語從句中的虛擬語氣
在表達驚異、惋惜、遺憾、理應如此等意義的主語從句中常使用虛擬語氣，其虛擬語其的結構為： should + 動詞原形，主句中的謂語動詞形式不限。
句型：
(1) It is admirable / dreadful / extraordinary / odd / remarkable / sad / advisable / annoying / disappointing / surprising / upsetting / frightening / better / best / curious / desirable / important / strange / peculiar / proper / necessary / natural …that…
(2) It is a pity / a shame / no wonder…. that…
(3) It is suggested / requested / desired / proposed /…. that …
(4) It worries me that…
如：
It is important that we should do well in our lessons first. 我們先把功課學好很重要。
It is strange that he should not come. 很奇怪，他竟沒有來。
It is a pity that we should not meet last night. 真遺憾我們昨天晚上沒有見過面。
It worries me that we should be blamed for that. 我們竟要受責備真讓人煩惱。
五、表語從句及同位語從句中虛擬語氣
英語中，表示請求、要求、命令、建議等名詞advice, desire, decision, idea, instruction, order, plan, proposal, recommendation, request, requirement, suggestion, wish充當句子的主語而後面接表語從句或它們後面接同位語時，表語從表面上看幾屗及同位語從句都須用虛擬語氣。其虛擬語氣的結構為：(should) + 動詞原形。如：
We followed his advice that we should ask our teacher for help. 我們接受了他的建議：我們應該請求老師的幫助(from www.yygrammar.com)。
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。
His suggestion is that we should do our work more carefully. 他的建議就是我們的工作要更細心些。
Their plan is that they should build a new factory in their hometown. 他們的計劃就是在家鄉建一座新工廠。
六、定語從句中的虛擬語氣
英語中，表示：「早該做某事了」時，定語從句中的謂語動詞須用虛擬語氣，其虛擬語氣的結構為：It is (high / about) time that + 主語+ 動詞的過去式/ should + 動詞原形。如：
It is time that I went to pick up my daughter at school. 我該去學校接我的女兒了。
It is high time you should go to work. 你早該上班了。
七、簡單句中的虛擬語氣
1. 說話時，為了表示客氣、謙虛、委婉而有禮貌，言語常使用虛擬語氣。其虛擬語氣的結構形式常為：would / could / might / should + 原形動詞。如：
Would you mind my shutting the door? 我把門關起來你介意嗎？
You should always learn this lesson by heart. 你要把這個教訓牢記於心。
I should agree with you. 我應該同意你的觀點。
2. 表示「祝願」時，常用「may + 主語 + 動詞原形 + 其他」。如：
May you have a good journey! 祝你一路順風。
May your youth last for ever! 祝你青春永駐。
3. 表示強烈的「願望」、「祝願」時，常用動詞原形。如：
Long live the Communist Party of China. 中|國|共|產|黨|萬|歲。
God bless us. 上帝保佑。
4. 習慣表達中常用的虛擬語氣。
(1) 提出請求或邀請。如：
Would you like to have a talk with us this evening? 今天晚上來跟我們聊天好嗎？
Could I use your bike now? 我可以用一下你的單車嗎？
(2) 陳述自己的觀點或看法。如：
I should glad to meet you. 見到你我會很高興。
I would try my best to help you. 我會盡力幫助你。
(3) 提出勸告或建議。如：
You』d better ask your father first. 你最好先問一問你的父親。
You should make a full investigation of it first. 你應該先全面調查一番。
(4) 提出問題。如：
Do you think he could get here on time? 你認為他能按時來嗎？
Do you expect he would tell us the truth? 你期望他會告訴我們真相嗎？
(5) 表示對過去情況的責備時，常用虛擬語氣。其虛擬語氣的結構為：「情態動詞 + have + 過去分詞」。如：
You should have got here earlier. 你應該早就到這里了。
You should have returned it to him. 你應該把他還給他了。
『伍』 哪位高手可以給我詳細的講講高中英語虛擬語氣
虛擬語氣(Subjunctive Mood)這一語法項目是各類英語考試中心測試的重點之一。虛擬語氣是一種特殊的動詞形式，用來表示說話人所說的話並不是事實，而是一種假設、願望、懷疑或推測。
Ⅰ用以表示虛擬條件的虛擬語氣
⒈ 用if條件從句表示的虛擬條件，是虛擬條件最普通的方式。
① 虛擬現在時表示與現在事實相反的假設，其if 從句的謂語形式用動詞的過去式(be 一般用were)，主句用would/ should/ could/ might +動詞原形，例如：If I were in your position I would marry her.
② 虛擬過去時是表示與過去事實相反的假設，if 從句的謂語形式用過去完成時即had＋過去分詞，主句用would / should / could / might + have +過去分詞，例如：If it had not rained so hard yesterday we could have played tennis.
③ 大多數的虛擬條件句屬於上面三種情況的一種，但並不排除存在條件和後果中，一個和現在情況相反，另一個和過去情況相反，例如：If you had followed what the doctor said, you would not have been so painful now.這個句子在高中出現頻率頗高。
④ 但是，如果後果用了虛擬語氣，而條件卻用陳述語氣，這種用法是錯的。
⒉ 除了表示虛假條件外，if從句還可以表示對將來的推測，由於是將來還沒有發生的，所以談不上是真實的還是虛假的，只能說這個事情發生的可能性有多大。一般情況下，可以用陳述語氣的if從句來表示對一個未來事實的推測，這個事實是完全可能發生的。If從句的謂語形式用一般過去式或用were to / should +動詞原形，主句用would / should /could/ might +動詞原形，例如：Jean doesn't want to work right away because she thinks that if she were to get a job she probably wouldn't be able to see her friends very often.（1996年1月四級第44題）
⒊ 有時可以把含有助動詞、情態動詞、be或have的虛擬條件句中的連詞if 省去，而將had , should, were 等詞提到主語之前，即用倒裝結構,這時候，如果出現not等否定詞，否定詞需放在主語後面。這種結構在口語中很少使用，但頻頻出現在各類考試中出現，例如：If it had not rained so hard yesterday we could have played tennis.→Had it not rained so hard yesterday, we could have played tennis.
⒋ 大多數的虛擬條件通過上面所講的兩種方法表達，但在個別句子中也可以通過介詞without和介詞短語but for表達，副詞otherwise等表達出來。例如：We didn't know his telephone number; otherwise we would have telephoned him.（1995年6月四級第46題）值得注意的是，包含but for的句子，謂語動詞必定要用虛擬形式，但包含without等短語的句子，謂語動詞未必一定要用虛擬語氣。
⒌ 有時虛擬條件不是明確地表達出來，而在蘊含在用but引導的從句里，於是便出現了有謂語動詞是虛擬語氣的主句加上謂語動詞是陳述語氣的but從句構成的並列復合句，例如I would have hung you but the telephone was out of order.在這樣的句子里，如果主句沒有用虛擬語氣，或者從句用了虛擬語氣，都是錯的。
Ⅱ用在賓語從句中的虛擬語氣
⒈ 在表示願望的動詞wish後的賓語從句中，需用虛擬語氣。（wish後的that 常省略），根據主句時態，從句謂語時態相應退後一位，例如：How she wished his family could go with him.
⒉ 在具有願望、請求、建議、命令等主觀意願的動詞(desire, demand, advice, insist, require, suggest, propose, order, recommend, decide …) 後的賓語從句中需用虛擬語氣。謂語動詞用(should) +動詞原形。值得注意的是，如果賓語從句的動詞是否定的，否定詞not的位置應在動詞之前，而不是動詞之後。例如：The head nurse insisted that the patient not be move.另外，如suggest表達「暗示」，insist表示「堅持某種說法」時，後面的從句不用虛擬語氣，例如：Her pale face suggests that she is ill.或He insisted that he did not kill the boy.
除此之外，上述動詞也要求用虛擬式
① 在It is+上述動詞的過去分詞，其後所跟的主語從句中，如It is suggested that pupils wear school uniforms.
② 在上述動詞相應的名詞形式作主語+連系動詞，其後的表語從句中，例如His suggestion was that classed be re-scheled.
③ 在對上述動詞相應的名詞進行解釋的同位語從句中，如：The workers raised the demand that their pay be increased to cope with the inflation.
⒊ would （had）rather , would sooner也用來表達主觀願望，它們之後的賓語從句中需用虛擬語氣。謂語動詞用過去式表示現在或將來，用過去完成式表示與過去事實相反，例如：I would rather he went right now.
Ⅲ其他形式的虛擬語氣
⒈ it is +necessary等形容詞後，that主語從句中虛擬形式使用，這類形容詞包括necessary, important, essential, imperative, urgent, preferable, vital, advisable等，例如It is necessary that you listen to the teacher carefully.或者It is essential that you be able to pronounce every single word correctly.
⒉ 在It's (high/about) time 之後的定語從句中需用虛擬語氣。謂語動詞用過去式，例如It is high time that you went to school
⒊ 虛擬語氣在as if / as though 引導的方式狀語從句中的應用（謂語動詞形式與wish後的賓語從句基本相同）表示與現在事實相反或對現在情況有懷疑，謂語動詞用過去式。例如：He felt as if he alone were responsible for what had happened. 表示過去想像中的動作或情況，謂語動詞用過去完成式。
⒋ 在lest 引導的狀語從句中，謂語動詞多用虛擬語氣，(should )+ 動詞原形。例如： The mad man was put in the soft-padded cell lest he injure himself.（1998年1月四級第38題）
⒌ 在if only 引起的感嘆句中需用虛擬語氣。謂語動詞用過去式或過去完成式。例如： Look at the terrible situation I am in! if only I had followed your advice.
『陸』 高中英語語法虛擬語氣，求指教…，，
1 句子意思是：同時，我發現多一點耐心，我可以使我的玩具用得更久一點。用could表示「可以，能夠」，must是「必須，一定」的意思。
2 if only的意思是「只要，但願」，後面跟的句子需要用虛擬語氣。如果是對現在的虛擬就用過去時，對過去的虛擬就用過去完成時。根據before I attended the lecture可以判斷這里是對過去的虛擬。
3 這個是條件狀語從句的虛擬語氣。如果是對一般現在的虛擬，從句if用過去時；對過去的虛擬，從句if就用過去完成時。根據逐句you would be all right now, 可以判斷是對過去的虛擬。
4 句子意思是「要不是那場雨，我們昨天就會有一個愉快的旅途。根據But for 和yesterday可以判斷是對過去的虛擬，should have done結構意思是」本應該做的沒做「。
5 這里」他打電話給我「是客觀的事實，不需要用虛擬語氣，所以去掉had。
6 It is +形容詞（例如important, necessary, surprising, essential等）後面that的從句都是用should do的虛擬語氣，should可以省略。這題也就是省略了should，所以改成win.