中考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．今天手机在我们日常生活中已广泛使用。但中学生在学校是否应该持有手机，一些学生和老师有不同的观点。你们学校的校刊英文版正在就此举行征文活动，请根据下列表格提示的内容，用英语写一篇征文。

要求：

1. 表达清楚，语法正确，上下文连贯；`

2. 必须包含表格所给的提示信息，并作适当发挥；

3. 词数：80-100词左右（征文的开头已给出，不计入总词数）。

Mobile phones have been used widely in our daily life

today.__________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________

【答案】Mobile phones have been used widely in our daily life today. With the development of economy, mobile phones are more and more widely used in our daily life. However, some parents and teachers have different ideas about whether the students should use mobile phones at school.

Some students are for it. They think that it is convenient to contact with parents. Mobile phones will make them more interested in learning so that they can learn more quickly and easily. Some teachers are against it．They think that some students can't control themselves and often play games. What's worse, some students cheat in exams by using mobile phones. Besides, using mobile phones too much does great harm to students' eyes.