hear sb do sth 听到某人做某事,省略to的不定式作宾语补足语,强调动作全过程。 hear sb doing sth 听到某人正在做某事,v-ing 作宾语补足语,突出动作正在进行。 例如: Last night,I heard Jack come back , unlock the door and enter his room. 昨天晚上,我听到杰克回来,打开门进入了他的房间。 When passed by the class room, I heard someone singing an English song in it. 当我经过教室的时候,我听到有人正在唱一首英文歌曲。
hear sb do sth 听到某人做某事,暗示过程完成.如:我听到他关掉电视.I heard him turn off the TV. hear sb doing sth 听到某人正在做某事,强调动作的进行,可能你听到的只是动作的一部分.如:我经过这里时听到有人唱歌.I heard someone singing when I passed by. 如果用I heard someone sing the song.就暗示“我”听完了整首歌.