Question

when引导的从句

Answer 1

when引导的从句如下：

when引导的时间状语从句可以接一段时间或者一个具体的时间点，从句的谓语动词可以是延续性的动词，也可以是瞬时动词。when表示“当…时”“在…时”，或"就在那时"。

在过去，when从句和主句的动作先后发生。

解释：表示在过去，主句和从句包含的动作先后发生了，或者主句或从句的动作先发生。

句子结构：when从句和主句都用过去式。

例句：

When I lived in the countryside, I usedto carry some water for him。

当住在农村时，我常常为他担水。

When they began to talk about him hepricked his ears。

当他们开始议论到他时，他竖起了耳朵。

His friends fell off one by one when hewas in adversity。

在他身处逆境时，他的朋友一个接一个离他而去。

He jumped with joy when he heard thegood news。

当他听到这一好消息时高兴得跳了起来。

He could swim when he was three yearsold 。

她三岁时会游泳。

说明：

主句过去式常用 was(were) about to， was(were) on the point 等词组。如： 

We were about to leave when he came in。

我们就要离开，就在那时他进来了。

We were about to start when it began torain。

我们刚要出发就开始下雨了。

He was on the point of leaving whensomeone knocked at the door。

他刚要走就有人敲门。