状语从句

(共33张PPT)
表示时间，地点，条件，目的等在句中充当状语的从句就叫状语从句。
时间状语从句
地点状语从句
原因状语从句
条件状语从句
目的状语从句
让步状语从句
结果状语从句
方式状语从句
when
whenever
as
while
before
after
until (till)
since
as soon as
在复合句中，由时间连接词引导的状语从句叫做时间状语从句
当……的时候
他到了就会告诉我们
When he arrives, he will tells us.
正在那时，表示的是事情发生的很突然。
Chen Wei and Susan were walking down the street when they saw an accident.
当……的时候，强调两个动作同时发生，引导的状语从句的动词必须是延续动词，不能是短暂动词，这是与when的不用之一。
While my wife was reading the newspaper, I was watching TV.
(was reading是延续性的动词，was reading和was watching同时发生)
含有对比的意思，译为：而，却
I like playing football while you like playing basketball.我喜欢踢足球，而你喜欢打篮球。（对比）
在...的同时；一边...一边...
We always sing as we walk.
随着
自……以来到现在，表示从过去某一个时间起到目前为止，主句一般用现在完成时，从句用一般过去式。
after在...之后
before 在...之前
He left the classroom after he had finished his homework .
Mr. Brown had worked in a bank for a year before he came here.
as soon as 一………就…….
We began to work as soon as we got there.
I will write to you as soon as I get home.
till /until直到………
　Xiao Ming didn’t leave home till / until his father came back.
when, while和as的区别
When she came in, I stopped eating.她进来时，我停止吃饭。
When I lived in the countryside, I used to carry some water for him.当我住在农村时，我常常为他担水。
We were about to leave when he came in.我们就要离开，就在那时他进来了。
(瞬间动词)
（延续性的动词）
1.当….的时候
2.就在那时
(瞬间动词)
while
While my wife was reading the newspaper, I was watching TV.
I like playing football while you like playing basketball.我喜欢踢足球，而你喜欢打篮球。（对比）
(was reading是延续性的动词，was reading和was watching同时发生)
1.当….的时候
2.然而
As
We always sing as we walk.
As he got old, it began to feel sad.
（as表示“一边……一边”）
(我们总是边走边唱.)
随着
1.一边一边
2.随着
When引导的从句中的动词既可以是延续性动词也可以是非延续性动词，并且when 有“正在那时”的意思
While 引导的从句中的动词只能是延续性动词，常常表示两个动作同时发生。While 也有“然”而的意思。
As常常表示“一边…一边”或者“随着”
地点状语从句
Where there is a will, there is a way. 有志者事竟成。
Wherever you go ,you should tell me.
引导词:where wherever
no matter when 无论哪里
目的状语从句
The boss asked the secretary to hurry up with the letters so that he could sign them.
The teacher raised his voice in order that the students in the back could hear more clearly.
引导词：So that ,in order that 为了/以便于
条件状语从句
We’ll start our project if the president agrees.
You will certainly succeed as long as you keep on trying.
You will be late unless you leave immediately.
引导词：if 如果 ，unless除非，as long as只要
You will be late unless you leave immediately.
You will be late if you don’t leave immediately,
注意Unless=if not
在时间和条件状语从句中遵循主将从现的原则
It will be four days before they come back.
As soon as I reach Canada, I will ring you up.
If it doesn’t rain tomorrow,
we will go hiking.
原因状语从句就是表示原因或理由。可以由because, as, since, for引导。
I do it because I like it.
Since he is busy, I won’t trouble him.
because, as ,since ,for 的区别
如果是回答why的问句，表示的原因是产生某一动作或情况的直接原因，或者原因构成句子的最主要部分。一般用because
You want to know why I am leaving
I am leaving because I am fed up.
厌烦
I do it because I like it.
如果原因已为人知，或并不是引起某一动作的唯一原因，或者不如句子的其余部分重要，就用as或者since. since 要比as稍正式一些，比as语气也稍强一些，但是两者都不如because强。as和since引导的句子一般放在句首，as引导的句子有时也放在主句后面。
Since he is only a little boy, I think we can forgive him.
他只是个孩子，我们能原谅他。
for引导的从句表示补充说明，而且要在主句后面，并且用逗号与主句分开。
They decided to stop and have lunch, for they were feeling quite hungry.
他们决定停下来吃午饭，因为他们觉得很饿。
结果状语从句表示结果，关联词有so…that…, so that, such… that等.
So that 意思是为的是……，以便能或使得能……强调的是目的。So that 后的从句常与情态动词连用引导目的状语从句。
So…that …意为“如此…….以至于……，或者如此….结果……。”强调由某种原因产生的结果，引导结果状语从句。
So that 有时也有结果是，以至于的含义，这是so that就能与so…that通用，但是so that 引导结果状语从句是，不能和might连用。
Such…that…与so…that….的区别
Such 后接名词，so后面接形容词或副词。但是当单数名词前有形容词时，such 放在不定冠词a (an)前，这时可用so代替such,
词序为so+形容词+ a (an)+名词。
如果是可数名词的复数，不可数名词时，则只能用such.
The article is so difficult that I can’t understand it.
It was such a lovely weather that we spend the whole day in the garden.
让步状语从句表示虽然，尽管，即使等概念，常用的关联词有though, although, if, even if, while, whereas等
如果用了although或though就不能用but，但是可以与yet或still连用。
Though I was tired, I still worked hard.
有些情况下只能用though而不能用although
1与even连用表示强调
Even though I didn’t know him, I kept smiling.
2 用在倒装句中
Yong though he is, he is quite experienced.
3用在as though 中，表示好像
It looks as though it is going to rain.
表示动作的方式。关联词有as, as if, as though
We should do it as the teacher told us.