when 和while的用法我不太明白以下见点:When Iwatching TV ,she walked in .从句为什么用过去式,不应为过去进行时吗?The thief ran away when I saw him．同上He said he was going to see the teacher on his way home.为什么用

when 和while的用法我不太明白以下见点:When Iwatching TV ,she walked in .从句为什么用过去式,不应为过去进行时吗?The thief ran away when I saw him．同上He said he was going to see the teacher on his way home.为什么用
when 和while的用法
我不太明白以下见点:
When Iwatching TV ,she walked in .从句为什么用过去式,不应为过去进行时吗?
The thief ran away when I saw him．同上
He said he was going to see the teacher on his way home.
为什么用Be going to
求求帮忙解决以上困难.
①句强调的不是那个时间点吗?
③句用was seeing不性吗?

when 和while的用法我不太明白以下见点:When Iwatching TV ,she walked in .从句为什么用过去式,不应为过去进行时吗?The thief ran away when I saw him．同上He said he was going to see the teacher on his way home.为什么用
when与while
when引导的时间状语从句表示“当……时候”多指一具体时间点,它所引导的从句中谓语动词可以是延续性的动词也可以是瞬间动词,主句和从句中的谓语动词可以是一般时,进行时或完成时；while引导的时间状语从句表示“正当……时,正在……时”（指同时）while指一段时间,不可指点时间,while引导的从句中谓语必须用延续性动词,谓语形式常用进行时或状态动词的一般时态.
①句：从句的位置在when后,因为在when后,所以才叫when引导的从句,when没有接主句的说法,目前除少打了was外,显示的是过去进行时
②句：when引导的从句中谓语动词可以是延续性的动词也可以是瞬间动词,本句中是瞬间动词,也可以
③句：那用什么呢~用be going to很对呀~

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...

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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.

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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 ...

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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。

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