英语语法专题原因和让步状语从句(讲解+练习,无答案)

中考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：

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

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，虽然这对我来说并不容易。

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。

二、英语书面表达专项训练

2．诚信是中华民族的传统美德，也是社会主义核心价值观内容之一。而你的朋友Daming最近却被诚信危机所困扰。上周末，他本来和Lingling相约一起去电影院看电影，但是他却因为在家复习考试，把这件事忘了，直到第二天才想起来。因此，Lingling很生气，并且不愿接受Daming的道歉。

请你就此事给校报投稿，以“The Importance of Promise”为题，内容要点如下：

1、简述事件；

2、谈谈自己的看法，并给Daming一些建议。

注意：

1、词数80—100；

2、行文连贯，逻辑合理；

3、文中不能出现真实的校名和人名；

4、文章的开头和结尾已为你写好，不计入总词数。

The Importance of Promise

Dear editor,

People always emphasize（强调） the importance of the promise, and they hate people who break their promise.

Promise is very important. Everyone should keep it.

Yours,

Tony 【答案】The Importance of Promise

Dear editor,

People always emphasize（强调）the importance of the promise, and they hate people who break their promise.

Recently, a thing happened to my friend, and I think it was really his fault. Last weekend, my friend Daming had a date with his friend Lingling to watch a movie. But he totally forgot it that day because of his review for his exam. So Lingling got too angry to forgive him. In my opinion, it was really his fault. Forgetting the date not only led to Lingling’s anger, but also made her lose trust in him. Keeping promises is always the traditional virtue of the Chinese nation. What Daming should do now is to ask for forgiveness and promise that he will never do that again. Promise is very important. Everyone should keep it.

Yours,

Tony 【解析】