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so far as, provided (that), on condition that.如:
If you go to the cinema tomorrow, I’ll
go with you.
We won’t go to his party unless he
2.till, until 在句首或强调句中,一般用until而不用till.从句在主句之后时,二者都可以用. * (主句)延续性动词(肯定句)+ until/till……(直到……为止) * (主句)瞬间动词(否定句)+ until/till……(直到……才……) *强调句型It is not until……that…… 如:He won’t believe it until he sees it with his own eyes. 3.before(在……之前,就……,才……)引导的从句中一般不用否定式谓语.
It was raining while Jane was waiting for the bus. *as从句中的动词是延续性动词时,侧重于从句和主句的动作同时发生,意为 “一边……一边……”
She always listens to light music as she doer some cleaning.
• 状语从句总述 • 时间状语从句 • 地点和条件状语从句 • 原因和结果状语从句 • 目的和让步状语从句 • 方式和比较状语从句 • 测评
总述
在复合句中担任状语成 分的从句，称为状语从句， 状语从句可以用来修饰主句 中的动词、形容词或副词等， 有时修饰整个句子。
状语从句可分为时间、 地点、原因、条件、方式、 让步、目的、结果、比较状 语从句等９种。状语从句放 在主句之前时，常用逗号分 开；放在主句之后，一般不 用逗号。每类状语从句有各 自不同的引导词。
常用句型有: It is long before…… 好久才…… It isn’t/won’t be long before…… 过了不久就…… 如:It will be a long time before she comes back from Australia. 4.after(在……以后)
时间状语从句Adverbial clauses of time
由下列从属连词引导：
1.when, while, as *when 引导的从句和主句的动作可同时发生,也可先后发生,从句中的动词既 可是延续性动词,也可是非延续性.
When we arrived, the dinner had already begun. *while强调从句和主句的动作同时发生,从句中的动词都是是延续性动词.
5.as soon as, no sooner...than, hardly…when, scarcely…when/before (一…就),表示主句和从句动作先后发生. 如:I’ll phone you as soon as I get to Guangzhou. 6.since(自…以来) *since+瞬间动词的过去式(前面常用现在完成时) *It is/had been+时间段+since……瞬间动词的过去时 如:It is three years since she joined the army. 7.常见的可用作连词引导时间状语从句的名词短语及副词 还有:the moment, the minute, every time, each time, the last time, the year等. 如:Don’t stop each time you meet with a word you don’t understand. • when, until/till, before, as soon as, the moment等引导时间状语从句时,如果主
六、其他注意
1.whatever, however, whichever, whoever, whomever, 既可以引导名词性从句，又 可以引导状语从句；而 no matter what, no matter how, no matter which , no matter who, no matter whom只可以引导状语从句 Whatever (No matter what) difficulty we meet, we’ll never give it up (状语从句) You are free to get whatever you want to . (宾语从句)
句的时态是一般将来时,则从句的时态用一般现在时.(主将从现) 如:Don’t worry about him. He’ll ring you when he gets there.
• 条件状Baidu Nhomakorabea从句
1.常用来引出条件状语从句的连词 有:if, so/as long as, unless, in case,
2. as if (though) 既可以引导表语从句, 又可以引导状语从句 He is walking as if he were drunk (状语从句) It looks as if it is going to rain. (表语从句)
3.suppose, think, guess, believe, imagine, expect…引导的疑问句, 把引导宾语从句 的特殊疑问词提到句首。 What do you suppose has happened to her ?
4. 由于主语从句、宾语从句较长，为此多将主语从句、宾语从句放在句末，用it 做形式主语或形式宾语。 It has been decided when we will have a field trip. ( 主语从句 ) We found it necessary to have a good knowledge of history. ( 宾语从句 )
