第1个回答 2007-04-21
when 和 while 的从句都可以是过去式,
如果是延续性动作,那么要用 过去进行时 ,如果是短暂性动作,那么用 过去式 就好了.
while 后面必须跟 过去进行时 ,从句看情况
when 后面看情况
He said he was going to see the teacher on his way home.
Be going to =will
就是将要的意思
可以替换成
He said he would see the teacher on his way home.
第2个回答 2007-04-21
When I was watching TV ,she walked in .
主从时态一致指的是都是过去时(即事情发生在同一时间),一般过去时和过去进行时都是“过去式”。
与事情的状态无关,正在进行或已经完成都可以。
He said he was going to see the teacher on his way home. =He said he would go to see the .......
be going to = will。这里不是过去进行时,而是一个固定短语的过去时。