新概念英语第二册第18课句子疑问"After i had had lunch at a village pub,i looked for my bag.I had left it on a chair beside the door and now it wasn't there!As i was looking for it,the landlord came in."这句话中为什么用as不用when或者while?
问题描述：
新概念英语第二册第18课句子疑问
"After i had had lunch at a village pub,i looked for my bag.I had left it on a chair beside the door and now it wasn't there!As i was looking for it,the landlord came in."这句话中为什么用as不用when或者while?
答