時間定語從句虛擬語氣

來源:文萃谷 3.11W

一、虛擬語氣用於定語從句中

時間定語從句虛擬語氣

在It is (high, about)time(that)…句型中,that引導的定語從句中的謂語常用一般過去時來構成虛擬語氣。

例:It’s about time that we put an end to this controversy. 現在該是我們停止這場爭論的時候了。 例:It is time we went to bed.

我們該去睡覺了。

二、虛擬語氣用於if only 引導的從句中

在if only引導的.從句中,謂語動詞須採用虛擬語氣,其用法與wish後賓語從句的用法基本相同,表示“但願”,“要是…就好了”的意思。 例:If only I knew what you wanted. 要是我知道你需要什麼就好了。

例:If only he had arrived in time,he would not have been punished.

他要是準時到達就好了。經典練習:

1、It’s already six o’clock now. Don’t you think it’s about time____? A)we are going home B)we go home C)we went home D)we can go home

2、If only the committee____the regulations and put them into effect as soon as possible. A)approve B)will approve C)can approve D)would approve

3、It’s necessary____the dictionary immediately. A)that he will return B)that he returned C)that he return D)that he has to return

4、She must have had an accident, or he____then.

A)would have been here B)had to be here C)should be here D)would be here

5、I apologize if I ____you, but I assure you it was unintentional. A)offended B)had offended C)should have offended D)might have offended

解析:

1、答案選C)。在it’s about time that…..句型中,定語從句的謂語動詞應用過去時來表示虛擬語氣。所以C項是正確的。

2、答案選D)。if only表示一種願望,謂語用“would+動詞原形”表示對將來事實的願望,所以D是正確的。

3、答案選C)。在由it is necessary 等引導的主語從句要使用虛擬語氣,虛擬語氣的謂語動詞用“should+動詞原形”或動詞原形。

4、答案選A)。由or引出的是與事實相反的假設條件,因此空缺處應填入表示虛擬語氣的謂語動詞。前一個分句中表示的是過去的時間,所以後一分句要用would have done的形式。所以A是正確的。

5、答案選B)。本題中but分句中的it was 表明事情發生在過去,因此條件句應用過去完成時,表示與過去事實相反,所以B是正確的。

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