As my father was leaving the house,the postman arrived.这个句子能不能把改成这样呢?

题目

As my father was leaving the house,the postman arrived.这个句子能不能把改成这样呢?
As my father left the house,the postman was arriving

答案

was leaving 表示正要离开的状态,表明正好碰到邮递员
left 表示已经离开,邮递员没见到,没赶上
是有一些差异的.