2018年普通专升本:英语语法知识总结之时间状语从句

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2018年普通专升本:英语语法知识总结之时间状语从句

浏览次数：次发布时间：2021-06-17

关于时间状语从句，专升本的考生要知道哪些内容？

状语从句

在复合句中，起状语作用的从句称作状语从句。根据语义，状语从句分为：时间状语从句、地点状语从句、条件状语从句、原因状语从句、让步状语从句、比较状语从句、目的状语从句、结果状语从句、方式状语从句。其位置可在主句之前，也可在主句之后。如果状语从句位于主句前，一般用逗号将其与主句隔开。

时间状语从句（Adverbial Clause of Time）

引导时间状语从句的从属连词和词组有when, whenever, as, while, before, after, until, till, since, ever since, once, so long as, as soon as, every time, each time, the moment, the minute, immediately, instantly, directly等。

【例句】 Whenever I met with any difficulty, he came to my help. Until we know the facts, we can’t do anything about it. Everybody was assigned a job as soon as they left university.

The moment she saw him, she knew he was her brother.

提示：几组从属连词和词组用法区分： 1、when, as, while

when 表示从句动作与主句动作同时发生，或先于主句动作。While表示从句的动作与主句同时发生，并有延续之意，所以这种从句的动作往往是延续性的。As表示从句动作与主句动作并行发生，所以常译为“边……边……”；有时也可表示从句动作比主句动作早些发生。从时间上来说，when指一段时间或一点时间，while只能指一段时间，as指一段时间。

【例句】

When Sally arrived, I was preparing lunch. While Cathy was doing the washing-up, she was planning her holiday.

The workers shouted slogans as they passed the square.

2、before, after 由before引导的从句主要表示主句动作发生在从句动作之前，如从句是过去时，主句要用过去完成时。After引导的从句则主要表示主句动作发生在从句动作之后，如主句是过去时，从句要用过去完成时。【例句】 He had pulled the trigger before we could stop him.

The computer went better after new RAM （内存）had been added to it.

3、as soon as, directly, immediately 表示从句动作一发生，主句动作随即就发生，常译为“一……就……”。【例句】 The doctor came directly he got the message.

As soon as he realized what was meant, he would be furious immediately.

4、the moment, each time, every time, by the time, the first time, theminute等表示时间的名词词组也可用于引导时间状语从句，起连接词的作用。【例句】 The moment I saw him, I knew something bad had happened.

Every time he came, he would bring us a lot of candies.

５、till/until, 表示“直到……”意义时无差别，但在句首一般只用until。肯定句中表示“直到……为止”，主句通常用延续性动词。否定句中表示“直到……才”，“在……以前（不）”，主句常用终止性动词，这种情况下，till/until可用before替代。【例句】 Tired of her usual hectic work at the office, she stayed from Monday till Friday at the summer resort. Though he promised to come at 4 p.m. this time, Johnson didn’t arrive until eleven o’clock.

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