came to his ears. ④I walked home that day ______ I could have taken a

　　taxi. (1)When the film ended, the people went back. (2)When I was young, I used to visit her. ※when可作为并列连词 (1)相当于and at that time

　　I was about to leave when he came. (2)相当于but at that time She just showed me the direction when she should have led me there. while从句动作持续(从句常用进行时态) 近些年多考主、从句动作的对比 It's unfair—I'm working while the others are sleeping.

　　※as还可表示“随着……”，“一边……一边……”。 As time goes on, it's getting warmer＝(With)time going on, it's getting warmer.

　　(2010·福建卷)The girl had hardly rung the bell ________the door was opened suddenly, and her friend rushed out to greet her. A．before

　　B．until

　　C．as

　　D．since 答案　A　[此处可译为“还未……就……”。] (2010·陕西卷)John thinks it won't be long ________he is ready for his new job. A．when

　　B．after

　　C．before

　　D．since 答案　C　[此处可译为“不到……就……”。]

　　热点3·2

　　A．as

　　B．before

　　C．since

　　D．when 答案　C　[此处译为“自从……”。]

　　A．whether

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