福师《英语写作》（五）
福师《英语写作》FAQ（五）Write your brief answers to the following questions on the lines given.
1) Is traffic a problem in your area?
2) What can people in your area do to avoid sitting in traffic on the way to work?
3) Are businesses in your area doing anything to help workers who have to travel a long time to get to work?状语从句知识点总结 （一）时间状语从句 在复合句中，由时间连接词引导的状语从句叫做时间状语从句。时间状语从句通常由when, while, as, after, before, since, until等词引导。 一、时间状语从句种类 1、引导的从句表示主从句的动作同时发生，或从句的动作在主句之前。when引导的从句的谓语动词可以是延续性的动词，又可以是瞬时动词。例如： When she came in, I stopped eating.她进来时，我停止吃饭。（瞬时动词） When I lived in the countryside, I used to carry some water for him.当我住在农村时，我常常为他担水。（延续性的动词） We were about to leave when he came in.我们就要离开，就在那时他进来了。 2、While引导的从句的谓语动作必须是延续性的，并强调主句和从句的动作同时发生（或者相对应）。并且while有时还可以表示对比。例 如：While my wife was reading the newspaper， I was watching TV. （was reading是延续性的动词，was reading和was watching同时发生）I like playing football while you like playing basketball.我喜欢踢足球，而你喜欢打篮球。（对比） 3、As表示“一边……一边”，as引导的动作是延续性的动作，一般用于主句和从句动作同时发生；as也可以强调“一先一后。例如：We always sing as we walk.我们总是边走边唱。（as表示”一边……一边“）As we was going out, it began to snow.当我们出门时，开始下雪了。（as强调句中两个动作紧接着先后发生，而不强调开始下雪的特定时间） 4、由before和after引导的时间状语从句，表示两个动作一前一后发生。 例如：It will be four days before they come back. 他们要过四天才能回来。 After you think it over, please let me know what you decide.你仔细考虑过以后，告诉我你是怎样决定的。
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