in a while;after a while 的用法区别.

问题描述:

in a while;after a while 的用法区别.

我是英语老师,帮帮你.
in a while=in a moment=in a minute=soon=at once=right away 立刻 马上
常用用于一般将来时,提问时用how soon
例:I will leave for Beijing in a while(我马上就去北京)
after a while=after a moment 一会儿以后,后来常用于一般过去时,提问时用when
例:After a while,we began to have a picnic.过不久,我们就开始野餐.
类似的还有 for a while=for a little while=for a minute一会儿(表很短的一段时间)提问时用how long
例:I have watched TV for a while(我只看了一会儿电视)
好了,祝你进步!