时间状语从句,when和while用法区分.她正在打信的时候,老板到了.打信是个时间段,可以用when也可以用while.When she was typing a letter,the boss arrived.While she was typing a letter,the boss arrived.我正要离开家时,邮递员到了.离开家时个时间点,只能用when.When I leaving the house,the postman arrived.是这样吗?
问题描述：
时间状语从句,when和while用法区分.
她正在打信的时候,老板到了.
打信是个时间段,可以用when也可以用while.
When she was typing a letter,the boss arrived.
While she was typing a letter,the boss arrived.
我正要离开家时,邮递员到了.
离开家时个时间点,只能用when.
When I leaving the house,the postman arrived.
是这样吗?
答
when 可以指一个时间点,也可以指一个时间段
但是while 只是指一个时间段.