Question

英语简单的语法

When +v. (过去式)，后面的句子动词应该用？was/were v.ing 还是v.过去式？

Answer 1

时间状语从句when后直接加动词过去分词的情况是，主句主语和从句主语一致，且与该分词是被动关系，比如：when asked about his girlfriend，he stopped talking at once.这实际上是一种省略，完整的句子 when he was asked about his girlfriend，he stopped talking at once.

Answer 2

这个不一定
比如
When he came ,I was reading. 他来的时候，我在读书。
When he came, I had finished read the book. 他来得时候，我已经读完书了。
When his father died, he knew nothing about it. 他父亲去世的时候，他一无所知。

Answer 3

不一定，也有表示被动的时候，要看一下跟主语的主被动，还有主从句的时态可以不同，

Answer 4

was/were v.ing