knock the door和knock on the door都对吧?有区别 knock做vt.和vi.有区别吗.分别怎么用呢

knock at the door 和 knock on the door有什么区别吗详解,谢 knock at the door和knock on the door到底有什么区别? knock at the door造句 knock the door和knock on the door都对吧?有区别 knock做vt.和vi.有区别吗.分别怎么用呢 knock off和knock Listen:Someone ______(knock) at the door. knock on the door 同义句 knock at the door敲门应该是knock at the door,有时也看到有用knock on the door的,还有是不是可以直接说“knock the door呢? Who is_______(knock)on the door? Who is_______(knock)on the door? knock knock knock knock knock knock 关于knock at the door.为什么不是knock the door? at表示什么? knock at a door和knock on a door的区别是什么