状语从句重难点讲解
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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