A. 从句在英语句子中的作用
定语从句：在句中做定语，修饰一个名词或代词，例：The boys who are playing football are from Class One.
主语从版句权：在复合句中充当主语的句子叫做主语从句.例：What we need are good doctors.
宾语从句：就是一个句子作动词或介词的宾语。例：They know (that) he is working hard.
表语从句：表语从句就是用一个句子作为表语。说明主语是什么或者怎么样。例：The question is when can he arrive at the hotel.
同位语从句：在复合句中用作同位语的从句叫同位语从句。它一般跟在某些名词后面，用以说明该名词表示的具体内容。例： I heard the news that our team had won．
状语从句: 指句子用作状语时，起副词作用的句子。它可以修饰谓语、、非谓语动词、定语、状语或整个句子。例：He smiled as he stood up.
B. 在英语句子中什么是状语有什么作用
状语是说明动抄词的情袭况的：
动词发生的地点：地点状语 saw a film in the cinema 看电影的地点是在电影院
时间：时间状语 saw a film yesterday 看电影的时间是在昨天
方式：方式状语 go to school by bike 上学的方式是骑自行车
原因，目的，结果，。。。
做状语首选的是副词，有些形容词在有些时候也可以做状语，但这个语法就有难度了，非谓语结构也可以做状语，再就是著名的状语从句了，相信你在考试中经常与它们相见。
C. 英语中状语从句怎么理解
状语从句相当于一个副词修饰主句中的谓语（包括非谓语动词）、定版语或状语，或权是整个子。
如：He left there yesterday.
He left there when he finished his work.
yesterday是一个副词，when he finished his work 是一个句子，但两者功能一样，都作状语，因此，when he finished his work 被称为状语从句。
D. 状语从句放在句中有什么作用
句子一般置于句首或句末。如
When he comes ,I'll call you.=I'll call you when he comes.
E. 英语中状语有什么作用怎么分析状语
状语的概念就是副词概念。
修饰形容词、副词、动词以及整个句子。
例如： I study hard. hard就是版状语，修饰动词study。
The book is very good.very是副词，修饰形权容词good。
很高兴为你解答！
老师祝你学习进步！
望采纳，多谢你的问题！^_^
F. 英语中的:状语从句 怎么理解
状语从句指句子用作状语时，起副词作用的句子。它可以修饰谓语、非谓语动词专、定语、属状语或整个句子。根据其作用可分为时间、地点、原因、条件、目的、结果、让步、方式和比较等从句。状语从句一般由连词(从属连词)引导，也可以由词组引起。从句位于句首或句中时通常用逗号与主句隔开，位于句尾时可以不用逗号隔开。
G. 英语中状语是什么什么是状语从句
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。
1When he came in, I was listening to the radio．
2As I was wandering in the street, I met her.
3While (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:
1Where there is water, there is life.
2Where there is a will, there is a way.
3Wherever you go, I will follow you.== No matter where you go, I will follow you.
4I 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.
1Tom was late for school this morning because he didn’t catch the early bus.
2I couldn’t go to Beijing on business as my mother was ill.
3Since all of us agreed about this plan, we will carry it out next week.
4We 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.
1If I am not busy tomorrow, I will play football with you.
2You won’t pass the exam unless you work hard on it.
3As 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.
1Although (though) I gave him some advice, he didn’t take them.
2John continued to work hard even if (even though) he felt sick.
3Whatever you do, I will support you.==No matter what you do, I will support you.
4Whoever you may be, I will not let you in. ===No matter who you may be, I will not let you
in.
5However 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
matterwh-．
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.
1You should do your homework as Tom did.
2Jerry 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.
1Cherry was walking quickly so that (in order that) she could arrived at the cinema in time.
2John 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