Hear sb to do sth 和 hear sb doing sth
问题描述：
Hear sb to do sth 和 hear sb doing sth
答
Hear sb to do sth :听到某人将要做某事
hear sb doing sth :听到某人正在做某事
O(∩_∩)O，希望对你有帮助，望采纳
答
hear sb do sth 是省略了to的动词不定式,
意思是：听见某人做某事,强调过程,或者经常性
被动时还原to,即：sb is heard to do sth
hear sb doing sth
意思是：听见某人正在做某事