I often hear him _____ ( sing ) in the next room.为什么答案上要求加ing?
问题描述：
I often hear him _____ ( sing ) in the next room.为什么答案上要求加ing?
答
hear sb.doing sth.听到某人正在做某事,题意为我经常听到他在隔壁房间唱歌,听到他唱歌都是正在进行的,所以用ing形式.
也有hear sb.do sth.表示听到某人做了某事,如果填原型sing ,感觉就跟题意不搭配了.