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2016高考英语必考范围大揭秘：when引导的从句

发布时间：2017-01-11 编辑：查字典英语网小编

　　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。

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