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四位一体——知识清单+难点突破+解题秘诀+易错题型
高中英语语法一点通——状语从句
知识清单
1、 时间状语从句
1. when, while和as的用法
1 when即可以引导一个持续性动作,也可以引导一个短暂性动作,可用于主句动作和从句动作同时发生,也可以用于从句动作先于主句动作发生。
When I lived there, I used to go to the seashore on Sundays.
When the film ended, the people went back.
2 while引导的动作必须是持续性的,侧重主句动作和从句动作相对比。
You can’t do your homework while you’re watching TV.
3 as表示主句动作和从句动作交替进行或者同时完成,意为“一边……一边……”或者“随着……”。
As my mother sang those old songs, tears ran down her cheeks.
As time goes on, it’s getting warmer and warmer.
④ 如果主句表示的是短暂性动作,而从句用延续性动词的进行时态表示在一段时间内正在进行的动作,此时when, while和as可以互换。
When/While/As I was walking down the street, I came across an old friend of mine.
2. as soon as, immediately/directly/instantly, the moment/minute/instant, hardly/scarcely...when..., no sooner...than...的用法
这些从属连词引导的从句都表示从句的动作一发生,主句的动作随即就发生,常译为“一……就……”。
The moment I heard the voice, I knew my father was coming.
No sooner had we arrived at the station than the train left.
The boy burst into tears immediately he saw his mother.
特别提醒: