由when引导的时间状语从句的用法

Question

由when引导的时间状语从句的用法

Answer 1

when引导时间状语从句时表示“当……的时候”,when既可以指时间段也可指时间点,从句中既可用延续性动词又可用非延续性动词,且动作既可和主句的动作同时发生又可在主句的动作之前或之后发生,注意体会如下例句：I’ll call you when I get there.我一到那里就给你打电话.// When the wind blows,all the doors rattle.只要风一吹,这门就吱嘎作响.// He stopped trying,when he might have succeeded next time.他不再试了,其实他可能下一次就成功.// When I came home my wife was cooking dinner.我回家时,妻子在做晚饭.　　如果when引导的时间状语从句的主语与主句主语相同,而从句的谓语又是be动词时,那么从句中的主语和be可以省略； 当when引导的时间状语从句的主语与主句主语相同时,往往还可以用“when＋分词”的形式替代该状语从句.例如：When (you are) in trouble,ask her for help.当你遭遇麻烦的时候去向她求助.// When I came into the room(=When coming into the room),I found him lying there asleep.当我进入房间的时候,我发现他躺在那儿睡着了.