初中英语状语从句

语从句是中考词汇和句法部分考查的重点内容之一。在复习状语从句时,主要任务是弄清楚引导各种状语从句的连词的用法。现就主要考查点简述如下:

1.引导时间状语从句的连词

主要有when, while, as, by the time, before, after, since, till/until, as soon as等。其中when?while和as都可表示"当……时候",但用法有区别:

①when意为"在……时;当……时",可表示"点时间"或"段时间",从句谓语可以是终止性动词,也可以是延续性动词。例如:

When I got home, he was having supper.

②as意为"边……边……"或"与……同时",重在表示两个动作同时发生。伴随进行。as从句是终止性动词时,主句通常也必须是终止性动词。例如:

They sang as they danced.

③while只可表示"段时间",从句谓语只限于延续性动词。例如:

While I was sleeping, my father came in.

注:从句谓语是持续性动词时,when、while和as可以互换?主?从句谓语都是终止性动词时,when与as可互换?从句谓语表示状态时,通常用while。

2.引导原因状语从句的连词

原因状语从句一般由because, since, as, for引导?注意as,because,since和for的区别:

①如果原因是构成句子的最主要部分,一般用because。because引导的从句一般不放在句子的开头。例如:

I missed the train because I got up late.

注:对于以why开头的问句,一般只能用because引导的从句来回答。

②如果原因已为人们所知,或不如句子的其余部分重要,就用as或since、since比as稍微正式一些。as和since引导的从句一般放在句子的开头。例如:

As he was not well,I decided to go there without him.

Since this method doesn't work, let's try another.

③for表示所说的理由是一种补充说明,因此,for引导的从句可以放在括号里,而且for引导的从句一般不放在句子的开头。例如:

I decided to stop and have lunch, for I was feeling quite hungry.

3.引导结果状语从句的连词

主要有so/such…that…,so that等。

1) so...that结构在某种情况下可以与enough to和too...to结构相互转换。例如:

She is so short that she can't reach the buttons of the lift. =She is too short to reach the buttons of the lift.

2)so that也可以引导结果状语从句,意为"结果是;以致于"。例如:

They missed the bus so that they were late for class.

注:so that也可引导目的状语从句,此时可用to或in order to替换,将其改为简单句。例如:

He got up early so that he could get to school on time. =He got up early to get to school on time. =In order to get to school on time,he got up early.

语从句是中考词汇和句法部分考查的重点内容之一。在复习状语从句时,主要任务是弄清楚引导各种状语从句的连词的用法。现就主要考查点简述如下:

1.引导时间状语从句的连词

主要有when, while, as, by the time, before, after, since, till/until, as soon as等。其中when?while和as都可表示"当……时候",但用法有区别:

①when意为"在……时;当……时",可表示"点时间"或"段时间",从句谓语可以是终止性动词,也可以是延续性动词。例如:

When I got home, he was having supper.

②as意为"边……边……"或"与……同时",重在表示两个动作同时发生。伴随进行。as从句是终止性动词时,主句通常也必须是终止性动词。例如:

They sang as they danced.

③while只可表示"段时间",从句谓语只限于延续性动词。例如:

While I was sleeping, my father came in.

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。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。