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1.If you had asked him yesterday,you would know what to do now.
2.He looks as if he had seen a ghost.
3.He looks as if he were an artist.
4.If only the alarm clock had rung.
5.If only I were you!
6.I wish he had visited us last night.
7.I would rather (that) I had not seen it.
8.I would rather you painted the wall green next time.
9.I suggest that we (should) hold a meeting next week.
10.It is time that the children went/should go to bed.
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1.句1中從句的謂語動(dòng)詞為had asked,是與過去事實(shí)相反的虛擬語氣;主句的謂語動(dòng)詞為would know,是與現(xiàn)在事實(shí)相反的虛擬語氣。
2.由句1、2、3、4可以看出,as if從句和if only后的句子常用虛擬語氣。表示對(duì)過去的虛擬用過去完成時(shí),如句2、4;表示對(duì)現(xiàn)在的虛擬用一般過去時(shí)(be動(dòng)詞常用were),如句3、5。
3.由句6、7、8可以看出,wish和would rather后的賓語從句中常用虛擬語氣。表示對(duì)過去的虛擬用過去完成時(shí),如句6、7;would rather后接的賓語從句中若表示對(duì)將來的虛擬用一般過去時(shí),如句8。
4.在表示建議、命令、要求等意義的詞如suggest,order,command,require等詞后的賓語從句中,謂語動(dòng)詞常用(should)+動(dòng)詞原形,如句9。
5.由句10可以看出,在句型“It_is_time_that...”中,從句的謂語動(dòng)詞既可以使用一般過去時(shí),也可以使用should+動(dòng)詞原形。
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