状语从句

发布网友 发布时间:2022-04-20 07:32

我来回答

2个回答

热心网友 时间:2023-07-12 14:54

重要链接:初中英语语法状语从句专项语法习题 (点击查看)

一:什么是状语从句?
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。

二:状语从句的分类。

1. 时间状语从句用法要点。
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,具体用法如下:
1. when 意为“当……时”,引导时间状语从句,表示主句的动作和从句的动作同时或先后发生。例如:
I feel very happy when you come to see me. 你(们)来看我时,我感到很高兴。
When you are crossing the street, you must be careful. 你(们)过街道时,一定要小心。
when引导的时间状语从句,when的从句可以用延续性动词,也可以用点动词。eg.
He was working at the table when I went in. 当我进去的时候,他正在桌旁工作。
Someone knocked at the door when I was sleeping. 当我正在睡觉时,有人敲门。
I will visit my good friend when I have time. 当我有空儿时,我将去看望我的好友。
I worked for a foreign company when I was in Shanghai. 当我在上海时,我为一家外国企业工作。
注:when也可以作并列连词,表示一个动词正在进行的时候,突然间发生了另外一件事。eg.
I was fishing by the river , when someone called for help.
我正在河边钓鱼,就在那时有人求救。
We were working in the chemistry lab, when the lights went out.
我们正在化学实验室工作,突然灯都熄灭了。
2. before 意为“在……之前”,引导时间状语从句时,表示主句的动作发生在从句的动作之前。例如:
We cleaned the classroom before we left school yesterday.昨天离开学校之前,我们打扫了教室。
He had been a cook before he went to college . 他上大学前曾当过厨师。
after 意为“在……之后”,引导时间状语从句时,表示主句的动作发生在从句的动作之后。例如:
After you use plastic bags, you mustn't throw them about. 你(们)用过了塑料袋之后,不准到处乱扔。
He called me after he had finished his work. 他在工作完之后给我打了个电话。
注:若主句和从句两个动作发生的先后顺序十分接近,那么也可以不用完成时态,例如上面的第二句可改成:He called me after he finished his work.
3. since引导的时间状语从句,译为“自从……”,主句常用现在完成时,从句常用一般过去时。eg.
We have made many mplings since we began to cook. 自从我们开始做饭起,我们已经包了许多饺子了。
We haven't seen each other since we parted . 我们自从分手以后一直没见过面。
注:常用句型:It is +时间段+since从句 译为:自从……有多长时间了。eg.
It is six years since she graated from the university. 自从她大学毕业已有六年的时间了。
4. until 意为“直到……时”,引导时间状语从句时,表示主句的动作发生在从句的动作之前。当主句的谓语动词是持续性动词时,主句常用肯定形式;当主句的谓语动词是非持续性动词时,从句常用否定形式, not... until... 意为“直到……才……”,这时的until可以用before 来替换。例如:
I'll stay here until you come back. 我会呆在这里,直到你回来。(stay表示的动作可以持续)
He didn't go to bed until he finished his homework.他直到做完作业才睡觉。(go to bed 表示的动作不能持续)
5. as soon as 意为“一……就……”,表示从句的动作一发生,主句的动作马上就发生。例如:
I'll tell him about it as soon as he comes back.他一回来我就告诉他这件事。
6. while引导的时间状语从句,常译为“与……同时,在……期间”,while的从句中常用延续性动词或表示状态的词。eg.
They rushed in while we were discussing problems. 当我们正在讨论问题时,他们冲了进来。
Father was cleaning the car while I was playing computer games. 当我正在打电子游戏时,爸爸正在清洗汽车。
注:while也可以作并列连词,表转折的关系,相当于but,译为“然而”。eg.
I like listening to music, while my brother likes doing sports. 我喜欢听音乐,而我的兄弟爱好运动。
7. till和until引导的时间状语从句,译为“直到……为止”,not … till / until引导的时间状语从句,译为“直到……才”。前者强调主句动作的结束,用延续性动词,后者强调主句动作的开始,用点动词。eg.
I will wait for my friend until / till he comes. 我要一直等到我朋友来。
We won't start our discussion until / till he comes.
我们要等到他来了,再开始我们的讨论。

热心网友 时间:2023-07-12 14:54

www.huanggao.net

声明声明:本网页内容为用户发布,旨在传播知识,不代表本网认同其观点,若有侵权等问题请及时与本网联系,我们将在第一时间删除处理。E-MAIL:11247931@qq.com