knocked

knocked 1.Whoknocked（over）thisvase?2.Sheislooking(after)thechildren.3.Put(on)yourjacket.

1.Who knocked this vase （over）? 2.She is looking (after) the children.不能换 3.Put your jacket (on) .4.Bring it (back) quickly.不能换5.The thieves woke the night watchman (up)

knockeddown和knockedoff的区别？