b.表示与过去事实不相符,用过去完成时
I felt as though we had known each other for years.我感觉我们好像认识多年了。(其实并没有认识多年)
c.表示与将来事实不相符,用wouldmight/could
It looks as if it might rain.天看上去好像要下雨。(不大可能下雨)
对比:
He looks as if he is young.看样子他好像很年轻。(他就是年轻)
He looks as if he were young.看样子他好像很年轻。(实际上他不年轻)目的状语从句
a.由in case, lest, for fear that引导的目的状语从句,动词用“should +动词原形”结构,表示忧虑或目的。
Please remind me of it again tomorrow in case I (should) forget.请你明天再提醒我这件事,以免我忘记。
She emphasized it again and again, lest he (should) forget.她一再强调这一点免得他忘记。
We had a meeting and talked the matter over face to face for fear that there
should be any misunderstanding.
我们开了一个会,面对面谈了这件事,以免发生任何误会.
b.在in order that和so that引导的目的状语从句中,往往用can(could)或may(might)。
I shall write down your telephone number so that I may not forget.我要把你的电话号码记下来,以免忘记。
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