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状语从句
在主从复合句中,用作状语的从句称为状语从句。常用状语从句有以下七种类型:
1.时间状语从句
表示时间的状语从句连接词通常用:
(1)when当…,as soon as 一…就… 表示某一时间发生的动作,从句谓语动词通常用一般现在时或者一般过去时。例如:
When he comes, I will give him the message.
当他来的时候,我将把这个信捎给他。
As soon as I receive his letter,I’ll let you know.
我一收到他的信,我就告诉你。
When she opened the bag, she found a note in it.
当她打开包,她发现里面有张条子。
As soon as I sat down, the waiter brought me a cup of tea.
我一坐下,服务员就给我端来一杯荼。
如果强调过去发生的两个动作有先后关系,从句谓语动词可以用过去完成时。例如:
When he (had) finished the exam paper, he handed it it.
他做完试卷后交了上去。
Assoon as they (had) returned from London, they drove to see their sick aunt.
他们一从伦敦回来,就开车去看望他们患病的姨妈。
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