In the morning ,I didn't hear my alarm clock ____ .
问题描述：
In the morning ,I didn't hear my alarm clock ____ .
空里应该填going off还是go off?为什么?
答
going offhear sb.doing sth.听见某人正在做某事 hear sb.do sth.听见某人做某事,指叙述动作本事,不强调“正在做”.e.g.I hear somebody singing English songs in the next classroom.我听到隔壁教室有人在唱英文歌...