作业帮when引导的从句
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when引导的从句
when引导的从句
when引导的从句
when引导的从句
when除了用来引导主语从句、宾语从句、时间状语从句、表语从句和定语从句,还有一种用法值得关注,那就是when引导并列分句,意思是“这时突然；就在那时”,强调另一个动作的突然发生.常用于以下句型中：（1）、主语 + be doing… when…意思是“正在做某事这时……”；（2）、主语 + be about to do…when…；（3）、主语+be on the point of (doing) …when…意思是“正要去做某事这时……”
[例句]
One day Chuck was on a flight across the Pacific Ocean when suddenly his plane crashed.有一天,Chuck正在太平洋上飞行,这时他的飞机突然爆炸了.
I don’t know when he will arrive.我不晓得他什么时候到达.
I thought of the happy days when I was in Beijing.我想起了在北京时的那段快乐日子.
I believe the time will soon come when there will be no weapons in the world.我相信世界上没有武器的日子不久就会到来.
I was walking along the river when I heard a drowning boy cry for help.我正在河边行走,这时我突然听到一个落水男孩求救.
I was about to leave when it began to rain.我刚要离开,这时下雨了.
I had just finished my exam paper when the bell rang,announcing the class was over.我刚做完作业,下课铃响了.
I thought of the happy days when I was in France.我想到了在法国时那段快乐日子.
I believe the time will soon come when there will be no weapons in the world.我相信世界上没有武器的日子不久就会来临.
[比较]
I was walking along the street when I caught sight of a tailor’s shop.我正在街上走,这时我看见一家裁缝店.
I was walking along the streets.Just at the moment I caught sight of a tailor’s shop.我在街上走.就在那时我看见一家裁缝店.