1、If + 主主 +did(were), 主主+would/could/might +動詞原形動詞原形A. If I were you, I would try it again.B. If he were free, he would go with you.如果我是你，我會再試一次如果我是你，我會再試一次。如果他有空，他會與你一起去的。如果他有空，他會與你一起去的。如果我有一百萬美元如果我有一百萬美元，我會買下這架飛機我會買下這架飛機。C. If I had one million dollars, I would buy the plane.If + 主主 +did(were), 主主+w

2、ould/could/might +動詞原形動詞原形If he had worked hard, he would have passed the examination.如果他努力學(xué)的話，他就通過這次考試如果他努力學(xué)的話，他就通過這次考試。If he had been there, he could have seen the filmIf I If I had marriedhad married her, I her, I would have beenwould have been unhappy. unhappy.要是當(dāng)時我和她結(jié)了婚的話要是當(dāng)時我和她結(jié)了婚的話，那我是很不幸的那我是

3、很不幸的。如果他那時在那兒的話如果他那時在那兒的話，他就能看到那部電影了他就能看到那部電影了。3. 對將來事實的虛擬對將來事實的虛擬(通常有時間狀語通常有時間狀語)If he came here tomorrow, I would tell him about it.If he were to come here tomorrow, I would tell him.If it were to snow tomorrow, we wouldnt go out.如果他明天來的話如果他明天來的話,我會告訴他這件事我會告訴他這件事.如果明天下雪如果明天下雪,我們就不出去我們就不出去.如果他明天來的話

4、如果他明天來的話,我會告訴他我會告訴他.條件狀語的倒裝：條件狀語的倒裝：如果條件狀語中有如果條件狀語中有were, had, shouldwere, had, should時時, , 可以倒裝成：可以倒裝成：were I youwere I you, I would try it again. , I would try it again. Were he freeWere he free, he would go with you. -, he would go with you. -Had he been there yesterday, he would have seen the fi

5、lm. Should it snow tomorrow, we wouldnt go out. werewereshould + should + 主主 + + 其它其它hadhadIf I were you, I would try it again.-If he were free, he would go with you.If he had been there yesterday, he would have seen the film.If it should snow tomorrow, we wouldnt go out.虛擬語氣在主語從句中的用法：虛擬語氣在主語從句中的用法：

6、 importantimportant necessary necessary natural naturalIt is + strange + that + It is + strange + that + 主主+(should) + +(should) + 動詞原形動詞原形 surprisingsurprising right rightIt is important that every student should be It is important that every student should be good at a foreign language.good at a f

7、oreign language.每個學(xué)生擅長一們外語是很重要的。每個學(xué)生擅長一們外語是很重要的。It is natural that he should think so.It is natural that he should think so.他這樣想是很自然的。他這樣想是很自然的。 insistinsist demand demand require require order order主主+ prefer + that + prefer + that +主主 +(should) +(should) +動詞原形動詞原形 commandcommand ask ask propose pr

8、opose suggest suggestHe insisted that he should be sent to work in countryside.I drop caps.I drop caps.十個字母十個字母Most students insist that have more English classes.他堅持要求他要到鄉(xiāng)下去工作。他堅持要求他要到鄉(xiāng)下去工作。在多數(shù)學(xué)生堅持要求多上英語課。在多數(shù)學(xué)生堅持要求多上英語課。虛擬語氣用在賓語從句虛擬語氣用在賓語從句: :suggest:suggest:除了建議之外的意思不能用虛擬語氣。除了建議之外的意思不能用虛擬語氣。例：例：He

9、 He insistedinsisted that he that he had donehad done right. right. 他堅持認為他做對了。他堅持認為他做對了。例：例：His expression His expression suggests suggests that he that he waswas not happy. not happy.注：注：insist:insist:動作發(fā)生在動作發(fā)生在insistinsist之后用虛擬語氣。之后用虛擬語氣。同位語從句中的虛擬語氣和表語從句中的虛擬語氣：同位語從句中的虛擬語氣和表語從句中的虛擬語氣：在在suggestion,

10、requirement, order, plan, idea, suggestion, requirement, order, plan, idea, proposal,proposal,后面跟同位語從句和表語從句用虛擬語氣后面跟同位語從句和表語從句用虛擬語氣。My suggestion is that we should visit the exhibition right away.That after came the order that we should cross the river.我的建議是我們應(yīng)馬上參觀展覽。我的建議是我們應(yīng)馬上參觀展覽。那天下午傳來命令，我們要過河。那天下

11、午傳來命令，我們要過河。虛擬語氣在目的狀語從句中的用法虛擬語氣在目的狀語從句中的用法主語主語+動詞原形動詞原形may/mightcan/could+may/mightcan/couldso thatin order that主語主語+動詞原形動詞原形We got up so early that we could catch the train on time.虛擬語氣在其它句中的用法虛擬語氣在其它句中的用法a. Its time + that +a. Its time + that +主主+ did + did +其其它它例：例：Its time that we went to Its ti

12、me that we went to bed.bed.b. b. 主主d + rather +d + rather +主主+ did + + did + 其它其它例：例：Id rather you posted the letter right away.Id rather you posted the letter right away.比較：主比較：主d rather + do.d rather + do.例：例：Id rather rent Id rather rent the house.the house.我寧愿你馬上把信寄掉。我寧愿你馬上把信寄掉。I I wishwish I I

13、rememberedremembered the address. the address.我要是記得地址就好了。（真可惜我忘了）我要是記得地址就好了。（真可惜我忘了）I I wishwish she she had not lefthad not left. .要是他沒有離開這里就好了。（他已離開）要是他沒有離開這里就好了。（他已離開）I I wishwish it it would rain would rain tomorrow.tomorrow.要是明天下雨就好了。（說話人以預(yù)料明天不會下雨）要是明天下雨就好了。（說話人以預(yù)料明天不會下雨） would wouldc. wish + t

14、hat clause didc. wish + that clause did had done had doneWithoutWithout在虛擬語氣的用法。在虛擬語氣的用法。We couldnt have done the work well without your help.If you hadnt helped us, we couldnt have done it well.沒有你（們）的幫助，我們本不能做好這項工作。沒有你（們）的幫助，我們本不能做好這項工作。Without Party leadingWithout Party leading, we , we couldntco

15、uldnt succeededsucceeded.-.-If Party If Party hadnt ledhadnt led us, we us, we couldnt havecouldnt have succeededsucceeded. .沒有黨的領(lǐng)導(dǎo)，我們本不可能成功。沒有黨的領(lǐng)導(dǎo)，我們本不可能成功。 混合條件句（主、從句所表達的動作的時間不一致）如：混合條件句（主、從句所表達的動作的時間不一致）如：If I If I had worked harderhad worked harder at school, I _ in a at school, I _ in a comfortable office fortable office now.a. would have sat b. had sa