状语从句重难点讲解

状语从句重难点讲解

本模块中我们复习了时间状语从句、条件状语从句和让步状语从句。下面我们来看看这三种从句中需要注意的几点。

时间状语从句

1.before / since

“ It be +一段时间+ before ... 结构”,在肯定句中常译为“多久之后才,, ”在; 否定句中常译为“不久之后就,, ”。如:

It will be three years before he graduates from university.

It was not long before he found another job.

It is / has been 一段时间+ since ...结构中,since从句的谓语动词多用一般

过去时, 表示动作或状态的完成, 计时的起点是动作或状态完成的那一时刻。在语义上, 从句动词为延续性动词时, 含有否定的意味; 从句动词为非延续性动词时,含有肯定的意味。如:

It is 3 years si nee he were here.表示他不在这儿已经3年了”

It is 3 years si nee he stopped smoki ng.表示他不抽烟已经 3 年了”

2.when / as / while

表示当,,时”，whe引导的从句的动作和主句的动作可以同时发生，也可先后发生,从句中的动词既可以是延续性的,也可以是非延续性的; as , while 引导的从句

强调主句和从句的动作同时发生,并且从句中的动词通常是延续性的。如:

When I lived there, I used to go to the seashore on Sundays.

While you were reading the paper, I was working.

As the kids walked home, they sang happily.

注意:当从句表示“随着”时,连词只能用as 。如:

As the day went on, the weather got worse.

3.till / until

两者都表示“一直到,,; 直到,, 才”基, 本上可以互换,但till 一般不位于句首。当表示主句动作延续到某时才停止时, 主句用肯定句; 当表示主句动作到

某时才开始发生时,主句用否定句。如:

I 'll wait hr e until / till the result comes out.

(wait这个动作延续到the result comes out停止，主句用肯定句

I won 't leave here until / till the result comes out.

(leave这个瞬间动作到the result comes out才发生,主句用否定句

条件状语从句>>>>>>>>>>>>>>>>>>>>>>

1.only if 意为“只有,只要”位, 于句首时句子用倒装结构。如:

Only if you put your heart into your work can you realise your dream.

2.引导条件状语从句的从属连词有:if , unless , so / as long as, in case, on

con diti on that, suppose / suppos ing, provided tha等。

让步状语从句

1.as / though / although

as引导让步状语从句必须采用倒装结构，常用结构为形容词、副词、名词(其前不用冠词、动词+ as +主语+其他”。though比较口语化，为了强调，从句可

以倒装; although 比较正式,多用于句首;两者都不与but 连用,但可与still , yet ,

nevertheless连用。女口：

Young though / as he is, he runs the company successfully.

Though / Although we warned him about the danger of travelling in the forest alone,

he went there without telling us.

2.“ no matte疑+问词”或疑问词+ ever引导让步状语从句,意为不管,,;

无论,, ”后, 面用陈述句语序。whether ... or ...,也可表示让步关系, 意为“不管,, 还是,,”。如：

Whatever (= No matter what you say, he won 't believe you.

I 'll not have you worry about hewrhether she 's well or ill.

【即学即练】从 A 、 B 、 C 、 D 四个选项中,选出可以填入空白处的最佳选

项。 1. Nancy enjoyed herself so much ____ she visited her friends in Sydney last year.

(福建2008

A.that B . which C. when D. where

2.A small car is big enough for a family of three y ou need more space for

baggage. (2008全国卷II

A.once

B. because

C. if

D. unless

3.I ' m sorry you ' ve been waiting so long, but it ' ll still be some time __ Brian

get back. (北京2008

A. before

B. since

C. till

D. after

4._____ , his idea was accepted by all the people at the meet ingt庆2007

A. Strange as might it sound