敲门英语可以说成 knock at on the door 因为书上写 knock at (on) the door on 是可以省略么?

敲门英语可以说成 knock at on the door 因为书上写 knock at (on) the door on 是可以省略么? 敲门和敲桌子用英语怎么说?那可不可以说成knock at the door呢？什么时候用at？ knock on;knock at;knock over;knock 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? knock on和knock at用差别么?是否都可以在 敲门、敲窗 的短语中使用? knock on knock into knock at knock up knock on与knock at的区别 Knock on 和Knock at 有什么区别啊? knock at和knock on有区别吗? knock at 和knock on 有什么区别? knock at 和knock on怎么用?RT knoch at 和knock on的区别 可以说there is a knock at the door吗这里的介词是用at还是用on?knock at和knock on有什么区别呀?P.S.上课时老师讲的是用on,我不太确定,是真的这样吗? 英语短语-knock off & knock at的中文意思knock off & knock at的中文意思,最好再说下区别 Please knock on the door before _into the Office.进办公室前请敲门 翻译 knock on 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?