状语从句语法讲解

咼中英语状语从句

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.

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

状语从句三、时间状语从句主句是一般将来时，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；主句是一般过去时忆：“主将

，从句用一般过去时.记从现”

(一)引导时间状语从句的连词有：As，whe n (whe never)，before，after，as soo n as，un til (till)，since，every time，once. |

（二）、具体应用1）“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.记忆：While 后用进行时.While we were having supper，

all the lights went out.

Please kee p quiet while others are study in g」

While I was writing letters last night，he was watching TV. 2 ）When 表示“就在”的时候"，

while 意为反而，可是，表示转折.One evening Beethoven was walking in a street，when he sudde niy stopped outside a little house.

3）When ever无论什么时候，随时

1.When ever some one throws in some rubbish，the truck p roduees a pi eee of music. 每当有人扔进一些垃圾时，它（汽车）就放一段音乐

2.When ever we' re in trouble，they will help us.

3.I go to the theatre, whe never I am free.

e and see me whe never you want to.你随时来看我

4) till和until(表示"直到” ”)句首多用until |

1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 wait ing un til/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 did n' t leave till/un til she came back.

5) si nee:主句用完成时，从句用一般过去时，si nee引导的从句间或可用现在完成时

It is two years since I have studied En glish.

1.We have known each other si nee we were childre n.

2.We have bee n friends （ever sin ce） since we met at school.

3.It is ”（一段时间）+since+—般过去时态句子

It is two years since my sister married. I

（一段时间）have/has passed since +—般过去时态句子 Two sisters have/has p assed since my sister married.

Si nce+时间点 1.1 have bee n at home since three o' clock this after noon.

2. Maria has bee n in Chi na si nee two years ago. | 6) Every time, each time, next time Every time you get back at ni ght, you drop your boots on the floor. Every time I catch cold, I have pain in my back.

Next time I go there, I will visit them. | 7) once —旦，就 Once you begin, you must go on. 你一开了头，就应该继续下去 .

四、地点状语从句

地点状语从句用 where, wherever 引导

We should go where the people n eed 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 worm welcome. 无论他们走到哪儿都受到热烈欢迎 .1 She follow him whose he goes.他无论到哪里她总跟着

五、原因状语从句

原因状语从句用 because （因为）,since （既然）,as （由于）引导1、字母由多到少，语气由强到弱.

2、

由 why 提问必须用 because 回答

Since, as 不回答why 的提问，而且从句一般放在句首‘because —般放在主句之后.

3、 before of + 名词

Because of the rain, we did n' t go to the park.

because 禾口 so 不可连用，只能选其一.(另有 although, but ) Why did n' t he come to school? Because he was ill.

Si nee I must die, I must. 既然我一定要死，我一定这样做 .

Si nee a lot of people make mistakes in life, Mr Smith wan ted to give Joh n a Chance.

5、for 并列连词，不能放在句首，主要放在两个并列句之间.For 所提供的理由为一个补充说明

而且前面常有逗号隔开

The days we short, for it is December now. 目的状语从句用 so （常用于口语）,that, so that, in order that 引导

目的状语从句的谓语常含有 may, might, can, could, should, would 等情态动词.

1. We'll sit n ever to the front so we can hear well.

2. He studied hard so that he might succeed.

3.

门I sp eak slowly so that you can take no tes. |

4. They hurried to the stati on in order that they could catch the train.

4、 八、

目的状语从句