2018中考英语语法专题原因和让步状语从句讲解练习（无答案）

原因和让步状语从句

一、原因状语从句

用从句来表示主句行为或事件发生的原因，这个从句就是原因状语从句。 常用引导词：because, since, as, for

1、because表示人们不知道的直接的原因或理由，着重点在从句；

通常用于回答why引出的疑问句，语气最强； 除特别强调外，该从句一般位于主句后面； 不能与so连用但是可以与so进行同义句转换。

I didn’t go aboard with her because I couldn’t afford it. 我没有和她一起出国是

因为费用太高。

2、as和since引导的原因状语从句多表示大家众所周知的理由，从句多位于主句之前，since译为“既然”。如：

As I didn’t know the way, I asked a policeman. 我不认识路，因而问警察。 Since traveling by air is much faster, they decided to take a plane. 既然乘飞机

旅行快得多，他们就决定坐飞机。

3、for表示的理由是附加的或推断的，并非此原因，通常与主句用逗号隔开，不位于句首，如： 练习

（一）用because, as, since, for填空

1. We’ll have to go to bed early ________ we’ll start off early tomorrow. 2. ________ you know all about it, tell me please. 3. ________ all the seats were taken, I had to stand.

4. He must be at work, ________ the light in his office is still on. 5. Lily didn’t go to school ________ she was ill. 二、让步状语从句

常用引导词：although, though “尽管虽然” 1、两者通常可互换，在口语中，though较为常见。

I can look after myself, although it won’t be easy for me. 我还是可以照顾自己的，虽

He must be not at home, for the telephone isn’t answered.

然这对我来说并不容易。

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Although Kevin is alone, he is very happy at first. 尽管凯文独自一人（在家），但他刚

开始还是挺高兴的。

He went on fighting, though he was wounded. 尽管受了伤，他还是继续战斗。

2、although/though和but不能用在同一个句子中；如： I do not often make dinner, but I can cook. 我不经常做饭，但是我会做。

Although I do not often make dinner, I can cook. 虽然我不经常做饭，但是我会做。

3、though可用作副词，放在句尾。 It’s hard work, I enjoy it, though. 这是件艰难的工作，可是我还是喜欢它。 I’ve a bit of headache. It’s nothing much, though. 我有一点头痛，不过并不厉害。

He said he would come, he didn’t, though. 他说他要来，可是他并没有来。

4、no matter who

= whoever

无论谁

no matter whom = whomever 无论谁

no matter what

= whatever

无论什么

no matter which = whichever 无论哪一个 no matter whose = whosever

无论谁的 no matter when

= whenever

无论什么时候

no matter where = wherever

无论哪里

no matter how

= however

无论如何、无论多么

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