idiom
a leap in the dark后果不可预料的行动; [喻]死 after dark黄昏后, 天黑后 be in the dark about完全不知道, 蒙在鼓里 be in the dark as to完全不知道, 蒙在鼓里 before dark黄昏前, 天黑前 in the dark在暗处,秘密, 暗中,完全不知道 keep dark躲起来,不说出来 keep sb. in the dark不让某人知道 leave sb. in the dark不让某人知道 keep sth. dark对某事保守机密 pitch dark非常黑 whistle in the dark黑暗中吹口哨, 给自己壮胆 dark of the moon一个月间看不见月亮的时候, 月黑时 dark of moon dark一个月间看不见月亮的时候, 月黑时
用法
主要用法有三个,即"已完成用法","未完成用法" 和"虚拟用法". 已完成用法表示一个动作或状态在过去某一时间或动作之 前已经发生或完成.如: Tom flew home, but his father had died. 未完成用法表示一个动作或状态在过去某一时间或动作之 前已经开始,一直延续到这一过去时间,而且到那时还未 结束,仍有继续下去的可能性.如: By six o‟clock they had worked twelve hours. 虚拟用法表示主观愿望和过去事实相反的,非真实的假设 虚拟情况.如: You didn‟t let me drive. If we _____ in turn, you _____ so tired.(NMET‟96) A. drove; didn‟t get B. drove; wouldn‟t get C. were driving; wouldn‟t get D. had driven; wouldn‟t have got (Key: D)