高中英语语法-语法·状语从句用法小结之一

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高中英语语法-语法·状语从句用法小结之一

  语法状语从句用法小结之一

    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 dumplings 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 graduated 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,notuntil 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)

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    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。

  --------------------------------------------------------------------------------

    (2)条件状语从句用法要点

    我们主要看一下由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,

  语法状语从句用法小结之一

    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 dumplings 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 graduated 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,notuntil 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。

  --------------------------------------------------------------------------------

    (2)条件状语从句用法要点

    我们主要看一下由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,