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, for1、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 PromiseDear 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 PromiseDear 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】【分析】本文为一篇稿件，需要学生通过大明和玲玲之间，大明没有信守承诺的事情，谈自己的看法。

信守承诺是中华民族的传统美德，在写作过程中，注意文章结构，先写出大明和玲玲之间的事情，然后再说自己对此的看法。

【详解】首先，第一句话直接点明作者的观点，大明是犯错了的。

然后仔细阐述了事情发生的经过。

接下来说出自己对此事件的看法，不信守承诺会导致失去别人的信任，对大明的建议是除了认错之外，还需要再次保证永不再犯。

【点睛】文章结构清晰，符合逻辑，先表明自己观点，然后阐述事情，提出自己的观点和建议。

整篇文章在谋篇布局上，比较严密。

除此之外，中间也使用了一些连接词，例如but，so，because of等，使文章更加通顺。

3．手机在生活中扮演着越来越重要的角色，许多中学生沉迷于手机无法自拔，比如你的好友Miller.请根据以下提示点写一篇短文：1. 去年，Miller对手机游戏非常入迷，而且花大量时间用手机聊天看电影；2. Miller与家人和朋友交流甚少，离开手机会很焦虑；3. 昨天还因为走路看手机被自行车撞了，膝盖受伤；4. 你的建议……参考词汇：mobile games手机游戏anxious焦虑be crazy about对……入迷要求：1字数80-100个2开头已经给出不计入总词数3要点齐全，行为连贯，适当发挥Today more and more people are addicted to(沉迷）playing the mobile phones. Last year, My friend Miller was【答案】Today more and more people are addicted to(沉迷）playing the mobile phones. Last year，My friend Miller was crazy about mobile games as well. He spent too much time in chatting and watching films on the phone. Miller hardly talked with his family and friends. He lived in his own world. He felt very anxious without mobile phones. Yesterday he was hit by a bike, because he was watching his phone at that moment. As a result, he hurt his knees badly.In my opinion, I think we can’t use the mobile phones for a l ong time, I mean, no more than half an hour a day. Don’t take mobile phones to school. A mobile phone is just a kind of tool, not our whole life.【解析】【详解】这是一篇给材料作文。

首先认真审题，看清题目中的要求和要点；然后根据提示内容，列出写作要点及每个要点中可能要用到的表达；再紧扣要点，动笔写作，可适当发挥。

在写作时，注意连句成篇，保持文章的连贯性，要层次清楚，要点分明，中心突出。

同时要注意语言的表述应该符合语法的结构，造句应该符合英语的表达习惯；尽量使用自己熟悉的单词句式，最好不要写太长的复合句；尽量选取简单的易拼写的单词，确保正确率；词汇、句式要丰富多样，可以为文章增色添彩。

最后要细心复核检查，确保正确无误。

4．书面表达初中毕业在即, 回顾三年的学习生活, 你一定有成功的体验, 如一次考试, 一次比赛, 一次表演......请你以Believe Myself, and I Will Win为题写一篇演讲稿。

提示：(1)What was the event?(2)How did you make it?(3)What’s your feeling?要求：(1)发言稿中须包括所有提示内容, 可适当发挥。