3-状语从句讲解

状语从句一、定义：在句中作状语的从句是状语从句，修饰主句中的动词、形容词或副词等。

状语从句由从属连词引导，从属连词在句中不充当句子成分，只起连接作用，状语从句放在句首时，要用逗号，放在句尾时不用.二、分类根据意义上的不同，状语从句可分为:①时间状语从句②地点状语从句③原因状语从句④目的状语从句⑤条件状语从句⑥结果状语从句⑦让步状语从句⑧方式状语从句⑨比较状语从句时间状语从句（一）引导时间状语从句的连词有:as, when(whenever), before，after，as soon as, until（till)，since, every time, once.（二）as, when，while都有“当……的时候”,可以互用When she was a child。

While she was a child, she Lived in Paris。

As she was a child。

as有“一边…一边"的意思He sang as he walked。

“when”When the clock struck twelve，all the lights went out。

I was sleeping when she came in。

When we arrived at the station, the train had left。

“while” 主、从句动作或状态同时发生。

用while引导的从句用延续性动词，常表示较长的时间或一个过程。

While we were having supper, all the lights went out。

Please keep quiet while others are studying。

While I was writing letters last night, he was watching TV.when，while并列连问。

when和while都可用作并列连问，连接并列分句。

When表示“就在……的时候”，while意反而,可是,表示转折。

One evening Beethoven was walking in a street，when he suddenly stopped outside a little house。

并列连词引导并列句，意思是就在那时。

一…就…的表达方式1）hardly／scarcely had done sth… when，no sooner had done sth… than：The performance had hardly begun when the lights went out．Hardly had the performance begun when the lights went out．演出刚开始就停电了。

He had no sooner drunk the coffee than he began to feel drowsy．No sooner had he drunk the coffee than he began to feel drowsy．他喝了咖啡没多一会儿，就犯困了。

2) as soon as , the moment, the minute, the instant, instantly, immediately..Immediately he earns any money he spends it．他钱一挣到手,就花光了。

I will call you as soon as I arrive.正在做…突然I was sleeping when the baby cried.正要做…突然I was on the point of sleeping when the baby cried。

I was about to sleep when the baby cried。

刚做了…就…I had just got off the bus when it started to rain.（三）、主句是一般将来时,时间状语从句用一般现在时表将来，主句是过去将来时,从句用一般过去时表示过去将来时，主句是一般过去时，从句用一般过去时。

1。

I' ll call you when I get there. 主将从现2. They said they would leave when they got the new。

3。

They left as soon as they got the new.Whenever 无论什么时候，随时=no matter when…1。

Whenever someone throws in some rubbish，the truck produces a piece of music.每当有人扔进一些垃圾时，它(汽车）就放一段音乐。

2。

Whenever we' re in trouble，they will help us.3。

I go to the theatre, whenever I am free。

4。

Come and see me whenever you want to。

你随时来看我。

till和until(表示“直到……"）句首多用until1、在肯定句中表示“直到……为止”，主句谓语动词要用延续性动词。

I was waiting until/till he arrived.2、在否定句中表示“直到……才”主句谓语动词常用终止性动词，这时until和till常被before 替换。

I didn’ t leave till/until she came back.倒装：Not until she came back did I leave.强调句：It was not until she came back that I left.She didn’t to to bed until her daughter came back.You can’t leave until I come back.直到我到那里我才了解那件事.直到老师进来学生们才停止讲话。

直到下周才开运动会.Since+时间点1。

I have been at home since three o’ clock this afternoon.2. Maria has been in China since two years ago。

since：主句用完成时，从句用一般过去时，since引导的从句间或可用现在完成时。

1.We have known each other since we were children。

2。

We have been friends （ever since）since we met at school。

3. It is …… (一段时间）+since+一般过去时态句子。

It is two years since my sister married.It is 3 years since I have studied English.2.every time, each time, next time, the first /second time/ third time/ last time…Every time you get back at night, you drop your boots on the floor.Every time I catch cold，I have pain in my back.（every time 分写不可以合写) 比较everyday (adj) 日常的，普通的every day 是名词短语，每天,天天Next time I go there, I will visit them.once 一旦…就Once you begin, you must go on。

你一开了头，就应该继续下去。

before…在…之前，趁…还没有Close the door before you leave the room.Write it down before you forget it .四个句式：1)三年之后我们会见面的It will be 3 year before we meet。

It will take 3 years before we meet。

很久以后我们会见面的。

It will be long before we meet. It will take long before we meet.2)不到三年我们就会见面的。

It will not be 3 year before we meet. It will not take 3 years before we meet.不久以后我们就会见面的。

It will not be long before we meet。

It will not take long before we meet。

3）三年之后我们见面了。

It was 3 year before we met。

It took 3 years before we met.很久以后我们才见面。

It was long before we met。

It took long before we met。

4) 不到三年我们见面了。

It wasn’t 3 year before we met。

It didn’t take 3 years before we met.不久之后我们见面了.It wasn’t long before we met. It did’t take long before we met.地点状语从句地点状语从句用where，wherever引导We should go where the people need us.我们应该去人民需要我们的地方。

Where there is a will，there is a way。

有志者，事竟成。

Wherever they went，they received a warm welcome。

无论他们走到哪儿都受到热烈欢迎。

= No matter where they went，they received a warm welcome.She follows him wherever he goes。

他无论到哪里她总跟着。

原因状语从句原因状语从句用because(因为)，since（既然）, as（由于), now that，considering/seeing that 引导The woolly shrank because it was washed badly。