4)连接词in case, lest, for fear that可以用来引导虚拟语气。其形式通常为:lest (in case, for fear that) + 主语 + should + 动词原形。Lest, for fear that 句中的 should 可以省去, in case 句中的 should 通常不省去,但是 in case 句中可以不用虚拟语气,而用陈述语气。Lest, for fear that后面也可以接其他形式。例如:
He took his coat with him in case it should rain.
他带着雨衣以防下雨。
I will not make a noise for fear that I (should/ might) disturb you.
我不会做声的,以免打扰你。
Care must be taken in using this method lest overflow (should) occur.
在使用这以方法的时候要谨慎小心,以免发生溢流现象。
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