knock into ,knock down

knock into ,knock down knock over knock down knock down 撞倒击倒 knock out 击倒 knock into sb撞在某人身上 knock off敲掉 knock on knock into knock at knock up knock get knock down是什么意思? knock you down 造句 knock over/into 用“knock into”造句, knock sth into sth knock into sb. knock over和knock down的分别?