when加过去式 的用法 比如 sb did sth等等
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when加过去式 的用法 比如 sb did sth等等
when加过去式 的用法 比如 sb did sth等等
when加过去式 的用法 比如 sb did sth等等
I didn't konw when he would leave.
I didn't konw where he would go.
I didn't konw what he would do. (would 是will的过去式)
看出了吗?when 和 后面的内容只有 逻辑上的关联.
when加过去式 的用法 比如 sb did sth:即是 when+句子,句子是过去式只是表明发生在过去的事情.
when+句子:是一个名词性结构,具有名词的作用,可以作主语,宾语,表语,同位语.
I didn't konw when he would leave.(作宾语从句)
where he would go was what she cared.(主语从句)
what she cared was where he would go (表语从句)
1 当.....时候(引导时间状语从句,从句中动词可以是瞬时,也可以是延续)
2 作突然讲,用于几个固定句型:be doing.......when be about to do when .......
had done ......when......
3 作...
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1 当.....时候(引导时间状语从句,从句中动词可以是瞬时,也可以是延续)
2 作突然讲,用于几个固定句型:be doing.......when be about to do when .......
had done ......when......
3 作虽然,尽管讲,多放于句中,少用于句首
4 相当于if
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