状语从句用法讲解和练习

合集下载
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。

第章状语从句

学习指导

状语从句在句子中作状语,用来修饰主句或主句的谓语。一般可分为九大类,分别

表示时间、地点、原因、目的、结果、条件、让步、比较和方式。尽管种类较多,

但由于状语从句与汉语结构和用法相似,所以理解和掌握它并不难。状语从句的关

键是要掌握引导不同状语从句的常用连接词。现分别列举如下:

第一节时间状语从句

2.when,while,as均可表示“当……的时候”。

when强调“特定时间”,表示主句谓语动词的动作与从句谓语动词的动作是同时发生的,或从句的动作发生在主句的动作之前;while表示的时间是一段,而不是一点,as多用在口语中,强调“同一时间”或“一前一后”,有时还有“随着”的含义。

I'll go on with the work when/come back tomorrow.我明天回来后会继续做我的工作。

When spring came, he felt like a trip.春天来了,他想去旅游。

As spring warms the good earth,all flowers begin to bloom.(as有“随着”的含义)

as, when, while都表示主、从句的动作或状态同时发生,但三者也有区别。as和when引导的从句既可表示一点时间,也可表示一段时间,从句中的谓语动词既可以是持续性动词,也可以为短暂性动词,经常可以互换使用;while引导的从句通常表示一段时间,从句中宜用持续性动词作谓语。当从句中的谓语动词为持续性动词时,这三者可以通用(前面例句中已有体现),再如:

Mother was worried because little Alice was ill, especially as / when / while father was away in France.妈妈担心,因为小艾丽思病了,特别是当父亲远在法国的时候。

如果从句和主句要表示一个人的两个动作交替进行或同时完成时,则多用as,可译为“一边......,一边......”。例如:

He looked behind from to time as he went.他一边走,一边不时地往后看。

As time goes on, it’s getting warmer and warmer..随着时间的推移,天气变得越来越暖了。

I thought of it just as you opened your mouth.你一张嘴我就知道你要说什么。(若表示两个短促动作几乎同时发生时,用as的场合多于when.)

当主从句之间表示转折或对比关系时,多用while, 不用as或when。如:

She thought I was talking about her daughter, while in fact, I was talking about my daughter.她以为我在谈论她女儿,而事实上,我在谈论我的女儿。

如果表示从句的动作在主句的动作“之前”或“之后”发生时,多用when(=after), 不用as或while。此外,when还含有“at that moment”的意思(= and then),引起的句子不能放在句首,也不能用as, while来替换。例如:

He was about to leave when the telephone rang.他正要离开,忽然电话铃响了。

We were watching TV when suddenly the lights went out.我们正在看电视,突然灯灭了。

They had just arrived home when it began to rain.他们刚到家,天就开始下雨了。

3.till/until,表示“一直到……”,主从句都用肯定式;表示“直到……才”,主句否定,从句肯定。

He worked until it was dark. 他一直工作到天黑。

He did not get up till his mother came in. 一直到母亲进来他才起床。4.once“一旦”,by the time“到……时”。

Once you see her, you will find what I said is true. 一旦你见到她就会发现我说的是对的。

by the time+现在时,主句用将来完成时。

By the time he arrives, we will already have left here. 等他到达时,我们将已离开这儿了。

by the time+一般过去时,主句用过去完成时。

By the time he arrived, we had already left here.他到达的时候我们早已离开这儿了。

5.as soon as,the moment表示从句动作一发生,主句动作随即发生,通常译为“一……就”。

As soon as I finish the work, I'll go to see you. 我一完成工作就会来看你。

She came to the scene the moment she heard the news.她一听到消息就来到现场。

6.since“自从”,before“在……前”,after“在……后”,It was not long before意为“不久”。

since引导从句用非延续性动词或“过去时间点”或“过去时间段+ago”,主句用完成时态。

Since he graduated, he has worked in this city. 他毕业后一直在这个城市工作。

I haven't seen him since last year/ three years ago. 去年以来/3年来,我没见过他。

选出最佳答案

1) _________ he was listening to the music, John fell asleep.

A. After

B. Before

C. While

D. As soon as-

2) How did you try to get to school on time you missed the school

bus.

A. when

B. how

C. why

D. that

3) He was riding to school ___ he was hit by a car this morning.

A while B. when C. as D. so

4) Lucy knew nothing about it __ her sister told her.

A. because

B. until

C. if

D. since

5) The policeman asked the child _ c ross the street ____ t he traffic

lights turned green.

A. not; when

B. don't; before

C. not to; until

D.

not to; since

相关文档
最新文档