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状语从句同副词、介词词组等作状语一样，用于修饰谓语，说明谓语动作的时间、地点、方式、手段、条件、程度、比较、原因、目的、结果等许多内容。
状语从句的用法
表示时间：
When she arrives here, call me.
当她到了，叫我。
I was going out when the phone rang.
我正要出门，突然电话响了。
Lily listening while she is dancing.
莉莉一边听一边跳。
表示地点：
You should stand up where you fell down.
你应该在摔倒的地方爬起来.
Wherever you go, keep this in mind.
无论你去哪里，都要牢记这一条。
表示原因：
The workers had tostop their work because it was raining hard.
工人们只得停止干活，因为在下大雨。
Since you know it already, we don’t need to keep it a secret.
既然你已经知道了，我们没有必要保密了。
Now that everyone is here, we may as well start our meeting.
既然大家都到了，我们不妨开始开会。
It must be light now, for I can hear many people walking on the street.
准是天亮了，因为我听见很多人在街上行走了。
As he likes it very much, I will give it to him.
由于他非常喜欢这东西，我打算送给他。
表示结果：
Jane is so fat that she doesn’t dare to eat pork.
珍妮非常肥胖，她不敢吃猪肉了。
Robbie is such a nice boy that everyone likes to be with him.
罗比是很好的男孩，大家都喜欢同他在一起。
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