going off
hear 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.
I heard someone enter the room and I did not look up to see who it was.我听见 有人进屋,我没有抬头看是谁.
going off
hear 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.
I heard someone enter the room and I did not look up to see who it was.我听见 有人进屋,我没有抬头看是谁.