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高中英语重要考点解析——状语从句
定义——在复合句中由从句表示的状语称作状语从句,状语从句由从属连词引导,也可以由一个起连词作用的词组引导,有时甚至不需要连词而直接和主句连接起来。
类型——时间、地点、原因、结果、条件、目的、让步、方式、比较状语从句。
时间状语从句
1.引导词 when, while, as, as soon as, once, before, after, every time, each time, since, whenever, ever since, until ,till等。
2.whenever, each time, every time的用法。 注:whenever=no matter when
every time / each time 每次, whenever 每当······时,表示习惯性、经常性的动作。
Whenever we met with difficulties, they came to help us.
Each time he came to town he would visit our school.
Eevery time I went to his house, he was out.
注:whenever=no matter when
whenever既可以引导时间从句也可引导名词性从句,no matter when只可以引导时间状语从句。
It does not matter whenever the party begins.
3.before的汉英表达
1)before的基本含义是“在·····以前”
The train had left before he got to the station.
注意:与before对应的是after引导的时间状语从句,表“在·····之后”。
2)强调从句动作发生的晚或慢,before可译成“(后)·····才”
句型:It was + 时间段 + before····· It will be + 时间段 + before·····
It seemed long