When I walked there,I heard Linda () in the room.

问题描述:

When I walked there,I heard Linda () in the room.
A.sings B.sang C.singing D.to sing
如果按动词不定式感官动词hear后应加sing,而按过去进行时应加singing,那到底加什么?

hear +do时意为看到某人做过某事
hear+doing是在看到的那个时候,看到某人正在做某事
区别在于动作的延续问题,此题是走过这时,听到Linda正在房间中唱歌选C