造句：hear sb do sth .look at sb do sth.make sb do sth .notice sb do sth .observe sb do sth .
问题描述：
造句：hear sb do sth .look at sb do sth.make sb do sth .notice sb do sth .observe sb do sth .
答
He heard her sing a song.
The boy looked at the teacher do the experiment.
My father made me sweep the floor.
I notice the girl enter the room.
The little girl observed the old man fish.