高三英語虛擬語氣知識(shí)點(diǎn)
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高三英語虛擬語氣知識(shí)1
含蓄條件句中的虛擬語氣
有時(shí)候,虛擬條件不是通過if引導(dǎo)的條件句來表示,而是暗含在上下文中。
(1)用but for 、without(如果沒有)等來代替條件從句。
?Without electricity human life would be quite different.
=If there were no electricity, human life would be quite different.
如果沒有電,人類的生活將會(huì)有很大不同。
(2)用otherwise、or(or else)、even though等表示與上文的情況相反,從而引出虛擬語氣。
?I lost your address. Otherwise, I would have visited you long before.
=I lost your address. If I hadn’t lost your address, I would have visited you long before.
你的地址我弄丟了,要不我早就去拜訪你了。
(3)虛擬條件通過but暗示出來。
?He would have given you more help,but he was too busy. 他本來會(huì)給你更多的幫助,但是他太忙了。
也就是說,如果那時(shí)他不忙,他可以給你更多的幫助。句中but he was too busy實(shí)際上暗示了一個(gè)虛擬條件——如果那時(shí)他不忙。
?He would lose weight,but he eats too much. 他本來可以減肥的,但是他吃得太多了。
也就是說,如果他吃得不多的話,他是可以減肥的。句中的but he eats too much實(shí)際上暗示了一個(gè)虛擬條件——如果他吃得不多。
高三英語虛擬語氣知識(shí)2
名詞性從句中的虛擬語氣
1.用于表示建議、愿望、命令等動(dòng)詞后的賓語從句中
常見的動(dòng)詞有:demand,order,require,insist,suggest,propose,advise,request,urge,command,prefer,desire,recommend等。賓語從句中的虛擬語氣結(jié)構(gòu)為"should+動(dòng)詞原形",should可以省略。
?Her mother suggested that she should go and see the doctor.她媽媽建議她去看醫(yī)生。
【特別提醒】
★ suggest表"暗示",insist表"堅(jiān)持認(rèn)為"時(shí)不用虛擬語氣。
試比較:
?He insisted that I had read his letter. 他堅(jiān)持說我看過他的信。
?He insisted that I should read his letter. 他堅(jiān)持要我看他的信。
?He suggested that we (should) stay for dinner. 他建議我們留下吃飯。
?I suggested that you had a secret understanding with him. 我覺得你與他心照不宣。
2.用于主語從句中
常見句型:It is important/necessary/urgent/essential/ ... + that...
It is sb’s order/desire/suggestion/advice/ ... + that...
It is suggested/advised/demanded/requested/ ... + that
從句謂語形式:(should+)動(dòng)詞原形
?It is ordered that the army (should) get there by 4 a.m. 軍隊(duì)必須在上午4點(diǎn)之前到達(dá)那里。
?It is necessary that we (should) clean the room every day. 我們每天打掃房間是有必要的。
?It is suggested that the meeting (should) be put off till next week.人們建議會(huì)議推遲到下周。
3.用于表語從句和同位語從句中
在suggestion,proposal,order,plan,idea,request,advice等名詞后的表語從句和同位語從句中要用虛擬語氣,其構(gòu)成是"should+動(dòng)詞原形",should可以省略。
?His demand is that the boy should go with him.他要求這個(gè)男孩和他一起去。
?Our suggestion is that you (should) be the first to go. 我們的建議是你應(yīng)該第一個(gè)去。
?He issued the order that the troops (should) withdraw at once. 他命令部隊(duì)馬上撤退。
高三英語虛擬語氣知識(shí)3
其他句型中的虛擬語氣
1.would rather后的賓語從句中,表示愿望,意為"寧愿;但愿"。用一般過去時(shí)表示與現(xiàn)在或?qū)硎聦?shí)相反;用過去完成時(shí)表示與過去事實(shí)相反。
?I would rather he had passed the exam.
我寧愿他通過了那次考試。
2.在"It is (about/high) time+that從句"中,謂語動(dòng)詞常用過去式或"should+動(dòng)詞原形"表示虛擬語氣,注意should不可省略。
?It’s high time that we devoted ourselves to environmental protection.
是我們致力于環(huán)境保護(hù)的時(shí)候了。
3.a(chǎn)s if,as though引導(dǎo)的表語從句和方式狀語從句中常用虛擬語氣,與現(xiàn)在事實(shí)相反用一般過去時(shí);與過去事實(shí)相反用過去完成時(shí)。
?They talked and talked as if they would never meet again.
他們談啊談好像永遠(yuǎn)不會(huì)再見面一樣。
4.if only引導(dǎo)的感嘆句中,用虛擬語氣表示愿望。
?Look at the trouble we’re in.If only we had taken our teacher’s advice!
看看我們所處的困境,要是我們接受老師的建議就好了!
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