时间状语从句连接词 时间状语从句

生活知识 2023-11-28 12:44:04
导读 大家好,我是小典,我来为大家解答以上问题。时间状语从句连接词,时间状语从句,很多人还不知道,现在让我们一起来看看吧!when, while和...
2023-11-28 12:44:04

大家好,我是小典,我来为大家解答以上问题。时间状语从句连接词,时间状语从句,很多人还不知道,现在让我们一起来看看吧!

when, while和as的用法:

(1)三者均可表示“当……的时候”,如果主句谓语动词表示的是短暂的动作,而从句表示的是一段时间,三者可以通用。例如:

I met an old friend of mine as / when / while I was walking along the street. (当我沿街散步时,碰见了我的一个老朋友。)

(2)as和when引导的时间状语从句中,谓语动词可以是终止性动词,while引导的时间状语从句中,谓语动词一般是延续性动词。例如:

It was raining hard when we got to the airport. (当我们到达机场时,天正下着大雨。)(不能用while 引导)

(3)as强调主句谓语动词与从句谓语动词表示的动作同时发生;while强调主句谓语动词表示的动作持续于while从句所指的整个时间内;when可以指主句谓语动词和从句谓语动词所表示的动作同时或先后发生。例如:

She sang as she went along. (她边走边唱。)

Please listen to me carefully while I read. (我朗读的时候,请仔细听。)

When he reached home, he had a little rest. (回到家以后,他休息了一会儿。)

before的用法与前面三个词区别较大,具体如下:

1. 表示“在…..之前就…..”。

Mary had finished her homework before her mother returned.

2. 表示“过了多久后才…….. ,动作进行到什么程度才……”

The man almost knocked me down before he saw me .

They walked about 30 miles to the west before they saw a village .

They worked day and night about three days before everything returned to normal .

3. 表示“来不及; 尚未…..就…”

Before I could get in a word , he had measured me .

He ran off before I could stop him .

She left the company before I could have a word with her .

4. 表示“刚…就…”

I had hardly sat down before the bell rang.

5. 表示“不知不觉就…..; 还没弄清就……”

Time passed quickly and three months went by before Aqiao knew it.

6. 表示“宁愿…,决不…,与其…,毋宁….”常与will 或would 连用。

I would die before I would tell

I’d shoot myself before I apologized to him.

I would / will die before I surrender .

7. 表示“否则;以免”

Do it now before you forget . I will write it down before I forget it .

8. 用于句型“it was +时间段+ before …” 表示 “过了多久才…”

It was three days before he came back. .

9. 用于句型 “ it was not long +时间段+ before …” 意为“不久就….”

It was not long before he sensed the danger of the position .

10. 用于句型“it will be(not )+时间段+ before….”表示“要过多久/ 不久…才…”

It will be half a year before you graduate from this school .

It will be not long before you find you are wrong .

本文到此讲解完毕了,希望对大家有帮助。

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