内容正文:
状语从句
1、 定义:
在复合句中修饰谓语(或其它动词)、形容词、副词或是整个句子的从句叫状语从句。
二、分类:
根据表达的意思不同,分为时间、地点、原因、目的、结果、条件、方式、比较、让步等九类状语从句。
一)、时间状语从句
时间状语从句是表示时间关系的从句。可以引导时间状语从句的连词很多,根据意义和主从句之间的时间关系,通常可以分为以下几种情况:
1. when, while, as引导的状语从句
1) when与while的区别
When I got home, my family were already having dinner.
When they were still talking and laughing, the teacher came in.
She fell asleep while she was reading the newspaper.
2) as的用法
They talked as they walked.
As time goes on, it's getting warmer and warmer.
如果主句表示短暂性动作 从句是延续性动作 此时when while as 可以互换
2. before, after引导的时间状语从句
1) before的用法:表示主句的动作发生在从句的动作之前。
2) after的用法表示主句动作发生在从句动作之后。
3. till, until, not until引导的时间状语从句
1) until/till用于肯定句时,表示“直到……为止”,主句的谓语必须为持续性动词。
2) not...until/till表示“直到…才…”,主句中通常要用短暂性动词,这时until和till可用before代替。
3) 而until可以放在句首
Until you told me i had no idea of it.
4) not until…在句型中的强调和倒装用法。
It was not until you told me that I had any idea of it.
Not until you told me did I have any idea of it.
4. since引导的时间状语从句
1) 当since意为“自从……”时,主用常用现在完成时