虛擬語(yǔ)氣

　　1.It is (high) time that 后面的從句謂語(yǔ)動(dòng)詞要用過(guò)去式或用should加動(dòng)詞原形，但should不可省略。

　　It is time that the children went to bed.

　　It is high time that the children should go to bed.

　　2.虛擬條件句的從句部分如果含有were, should, 或had, 可將if省略，再把were, should或had 移到從句句首，實(shí)行倒裝。

　　Were they here now, they could help us.

　　=If they were here now, they could help us.

　　Had you come earlier, you would have met him

　　=If you had come earlier, you would have met him.

　　3.a. 同現(xiàn)在事實(shí)相反的假設(shè)。

　　句型 ： 條件從句　　　　　主句

　　一般過(guò)去時(shí)　　　should( would) +動(dòng)詞原形

　　If they were here, they would help you.

　　b.表示于過(guò)去事實(shí)相反的假設(shè)。(在各類考試中,該結(jié)構(gòu)常把had提前構(gòu)成倒裝)

　　句型： 條件從句　　　　　 主句

　　過(guò)去完成時(shí)　　　 should(would) have+ 過(guò)去分詞

　　If she had worked harder, she would have succeeded.

　　2009年專升本原題：30. ____________, everything would have been all right.

　　A. He had been there B. Been here he had

　　C. Here he had been D. Had he been here

　　c.表示對(duì)將來(lái)的假想

　　句型：　 條件從句　　主句

　　一般過(guò)去時(shí)　　　　　 should+ 動(dòng)詞原形

　　were+ 不定式　　　　 would + 動(dòng)詞原形

　　should+ 動(dòng)詞原形

　　If you succeeded, everything would be all right.

　　If you should succeed, everything would be all right.

　　If you were to succeed, everything would be all right.

　　考點(diǎn)：虛擬語(yǔ)氣在賓語(yǔ)從句中的應(yīng)用

　　在表示命令、建議、要求等一類動(dòng)詞后面的從句中。

　　order, suggest, propose, require, demand, request, insist, command, insist + (should) do

　　例：I suggest that we (should) hold a meeting next week.

　　2009年原題：

　　6. The teacher insisted that we________ our homework before 9：00 o’clock

　　A. finished B. had finished

　　C. finish D. was finishing