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1.原因状语从句定义
原因状语从句表示主句中动作或状态发生的原因或理由，可位于主句之前，之后或插在主句中间。主句表示结果，从句表示原因，主要 由 because，as，since，for。
2.原因状语从句的用法
3.优选试题
选择题
1. The man can’t get on the bus ______ there is no room on it.
A. though B. because C. until D so that
新概念英语第一册53课课文，2. ______ her daughter hadn’t come back，______ she looked worried.
A. Because，/ B. Because，so C. Though，but D. Though。
3._______ you’ve got a chance，you might make full use of it.
新概念英语第一册第53-54课An interesting climate 导语：气候是指一个地方多年的天气平均状况，气候的变化很是有趣，下面是一篇“有趣的气候”的英语课文，欢迎大家来学习。Lesson 53 An interesting climate有趣。
A. Now that B. After C. Although D. As soon as
A. and B. for C. but D. or
A. so B. but C. and D. for
http://wwenglish.com 新概念英语视频第一册 http://www.xuexinet.com/document/xuexidetail.asp?id=1217 新概念英语视频第二册 http://www.xuexinet.com/document/xuexidetail.asp?id=1218 新概念英语视频第三册 http。
6.____ nobody was very interested in it，they decided to cancel the trip.
A. Although B. Since C. If D. While
A. but that B. for that C. and that D. in that
9. Animals suffered at the hands of man____ their habitats were destroyed by people to make way for agricultural land.
A. in which B. for which C. so that D. in that
10.____ Tom has no interest in piano，there is no point pushing him to learn it.
A. Now that B. In case C. Even if D. As if
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