第1个回答 2011-08-29
hear sb / sth doing 表示听某物(某人)正在做某事,强调动作正在进行。
hear sb / sth do表示听到某物(某人)做某事,强调动作已完成。
如:I hear Lucy singing in her room.
我听见露西正在房间里唱歌。
I usually hear Lucy sing in her room.
我经常听到露西在房间里唱歌。
类似的动词还有 see , notice , look at , listen to等。例:
Do you hear someone knocking at the door? ( 讲时还在敲 )
I heard someone knock at the door three times . ( 讲时敲的动作已结束 )
I often see him dance in the classroom.
我经常看见他在教室里跳舞。
I see him dancing in the classroom.
我看见他正在教室里跳舞。