when后面加什么时态的句子_when后面跟什么时态

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1、认真阅读来，你源就懂了。

2、比如说：He came. She was waiting. --------用when 和 while把它们合并起来。

3、1 He came WHILE she was waiting.2 WHEN he came,she was waiting.3 WHILE she was waiting, he came.4 She was waiting WHEN he came.。

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