状语从句的语法问题```

状语从句的语法问题```
状语从句的语法问题```

状语从句的语法问题```
其实要学习一个语法并不是一句两句可以说的清楚的``
我想更好的办法还是去买书看下
然后根据一些例题好好的理解一下``这样就还满容易弄明白的``
我大概的弄了一段解释,希望有点帮助：
一 定义：
A 状语主要是用来修饰动词和形容词的,以表明动作发生或状态存在的时间,地点,原因,等.
1 Ten years ago, She began to live in Dalian.
时间状语修饰began
2 The boy was praised for his bravery.
原因状语修饰was praised
B 状语从句就是用一个句子来代替上面的时间状语和原因状语.
1 Ten years ago, she began to live in Dalian.
When she was 12 years old, she began to live in Dalian.
2 The boy was praised for his bravery.
The boy was praised because he saved the baby’s life in the freezing river.
二 状语从句的种类：
A 时间状语从句:
连接时间状语从句的连接词有:
(1) 连词：when, while, as. 它们都表示当…时候的意思.如果主句和从句的动作同时发生且都是进行时
态,只用while, as. 其他情况下when, while, as通用.
1 When he came in, I was listening to the radio．
2 As I was wandering in the street, I met her.
3 While (as) I was watching TV, my mum was cooking in the kitchen.
(2) 连词before, after, since, until(till). 当他们表示时间时,他们既是介词又是连词.
{ He usually drinks a cup of tea before he goes to school.
连词
He usually drinks a cup of tea before going to school.
介词
{
He usually drinks a cup of coffee after he comes back from school.
连词
He usually drinks a cup of coffee after coming back from school.
介词
{

I have lived in Dalian since my son was born in 1999.
连词
通常情况下,主句用现在完成时,从句用一般过去时.
I have lived in Dalian since 1999.
介词

{
I will wait here until(till) you finish your job.
连词
I will wait here until(till) 8pm.
介词
(3) 词组：as soon as
{ I will tell him as soon as he comes back.
As soon as she finishes her homework, she will play tennis.
通常情况下,主句用一般将来时,as soon as 引导的从句用一般现在时.
B 地点状语从句：
连接地点状语从句的连接词有：where, wherever=no matter where:
1 Where there is water, there is life.

2 Where there is a will, there is a way.

3 Wherever you go, I will follow you.== No matter where you go, I will follow you.

4 I will go wherever I can find a good job.== I will go no matter where I can find a good job.
C 原因状语从句：
连接原因状语从句的连接词有：because, as, since, for.
1 Tom was late for school this morning because he didn’t catch the early bus.
2 I couldn’t go to Beijing on business as my mother was ill.
3 Since all of us agreed about this plan, we will carry it out next week.
4 We listened carefully, for the speech was very important.
注意：
当连接原因状语从句时,because语气最强,as, since, for次之；because, as, since引导的从句可在主句前面或后面, for引导的从句只能在主句的后面.
D 条件状语从句：
连接条件状语从句的连接词有：if, unless, as long as.
1 If I am not busy tomorrow, I will play football with you.
2 You won’t pass the exam unless you work hard on it.
3 As long as you take my advice, you will outwit your rival.
注意：
一般情况下,if, unless, as long as 引导的从句用一般现在时,主句用一般将来时.
E 让步状语从句:
连接让步状语从句的连接词有：although, though, even if, even though, however, whatever, whenever, whoever, whichever.
1 Although (though) I gave him some advice, he didn’t take them.
2 John continued to work hard even if (even though) he felt sick.
3 Whatever you do, I will support you.==No matter what you do, I will support you.
4 Whoever you may be, I will not let you in. ===No matter who you may be, I will not let you
in.
5 However difficult it may be, we will overcome it. === No matter how difficult it may be, we
will overcome it.
注意：
一般情况下,although等于though, even if等于even though, however等于no matter how, wh-ever等于 no
matter wh-．

F 方式状语从句:
连接方式状语从句的连接词有：as, as if, as though.
1 You should do your homework as Tom did.
2 Jerry was lying on the bed as if (as though) he was very tired.
注意：

通常情况下,as if等于as though.
G 目的状语从句:
连接目的状语从句的连接词有：so that, in order that.
1 Cherry was walking quickly so that (in order that) she could arrived at the cinema in time.
2 John sent the mail by air in order that (so that) it might arrive a little early.
注意：
通常情况下,so that 等于in order that.
H 结果状语从句：
连接结果状语从句的连接词有：so…that, such…that.
{ He ran so fast that we couldn’t keep up with him.
She spoke English so clearly that all of us could understand her.
{ She is such a nice teacher that all of us love her.
She is a so nice teacher that all of us love her.
{ The chef cooked such nice food that we ate up at the end of the dinner.
The chef cooked so nice food that we ate up at the end of the dinner.
{ These were such interesting books that we kept reading until the end of the class.
These were so interesting books that we kept reading until the end of the class.
注意区别：
{ such + a + 形容词+ 可数名词单数 + that 或 such + 形容词 +可数名词复数或不可数名词 + that
a + so + 形容词 +可数名词单数 + that 或 so + 形容词 +可数名词复数或不可数名词 + that

状语从句：
用一个句子（从句）来作另一个句子（主句）的状语，用作状语的句子就叫作状语从句。作什么样的状语就叫什么类型的状语从句。例如：条件状语从句就是用一个句子来作条件状语。
状语从句的分类：
（1）时间状语从句
凡是从句都必须有引导词，引导时间状语从句的词有when，before，after，until，as soon as，while 等。
（...

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状语从句：
用一个句子（从句）来作另一个句子（主句）的状语，用作状语的句子就叫作状语从句。作什么样的状语就叫什么类型的状语从句。例如：条件状语从句就是用一个句子来作条件状语。
状语从句的分类：
（1）时间状语从句
凡是从句都必须有引导词，引导时间状语从句的词有when，before，after，until，as soon as，while 等。
（2）条件状语从句
主要看一下由if引导的条件状语从句。if 意为“如果”，引导条件状语从句时，表示假如有从句的动作发生就（不）会有主句的动作发生。例如：
If it doesn't rain tomorrow，we will go there by bike.如果明天不下雨，我们就骑自行车去那里。
If I get there early，I can see the doctor quickly.如果我早早地到那里，我就可以快点看病。
3）地点状语从句用法要点
常用where（哪里）和wherever（无论哪里）eg.
Where there is a will，there is a way. 有志者，事竟成。
We will go wherever the motherland need us most. 我们要到祖国最需要的地方去。
（4）原因状语从句用法要点
常用的引导连词有because，as和since，三者的区别是：在回答问题的时候，使用because；对于显而易见的原因，常用as或since；as和since的从句常放在主句之前，而because的从句常放在主句之后。eg.
Why did you go？ I went because Tom told me to go. 你为何去？那是因为汤姆叫我去。
He was angry not because we were late but because we made a noise.
他很生气不是因为我们来迟了，而是因为我们弄出了声音。
As it was raining hard，we had to be indoors. 由于雨太大，我们只好呆在家里。
Since you feel ill，you'd better not go to work. 既然你感觉不舒服，你最好不要去上班了。
（5）目的状语从句用法要点
常用的引导连词有so that，that和in order that译为：以便，为了，目的是。eg.
Please speak more slowly so that we can make full notes. 请讲慢一点，以便我们能作详细笔记。
I shall write down your address that I may not forget. 我要把你的地址记下来，以免忘记。
I sent the letter by air mail in order that it might reach him in time. 这封信我以航空信发出，以便他能及时收到。
注：目的状语从句可以用动词不定式来替换做目的状语。eg.
We work harder than usual finish it in a week. 我们比平常加倍努力工作以在一周内完成工作。
三、主句与从句时态一致的问题。
在时间状语从句和条件状语从句中，主句和从句之间的时态一致问题一般分下列两种情况：
1. 若主句是祈使句，或主句中有情态动词，或主句中谓语动词是一般将来时，那么从句用一般现在时表示一般将来时。例如：
Be careful when you cross the road. 过马路时要小心。
Put up your hand if you have any questions to ask. 如果你们有问题要问的话，请举手。
The traffic must stop when the lights are red. 红灯亮时，车辆必须停下。
2. 若主从句谓语动词都是陈述过去，那么主从句都可以用一般过去时。例如：
She could sing when she was four years old. 她四岁的时候就会唱歌。

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