The bus came after I for about half an hour
问题描述:
The bus came after I for about half an hour
为什么I后面要填had been waiting?
为什么不是had waited?
wait不是持续动词吗?
答
过去完成进行时had been waiting强调一直等到那个时候.had waited只是已经等
持续动词当然可以用于这里了
终止动词不行