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 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? 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? knock at the door造句 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？ then there came a knock at the door接着听到敲门的声音.came能改为followed吗. (2/2)译英.不敲门就进屋是不礼貌的.（impolite,knock at the door）汉译英 Listen:Someone ______(knock) at the door. When did someone knock at the door?当有人敲门时?Someone knocked at the door when I was having breakfast.当有人敲门时我正在吃早餐.请帮我看看翻译错没有 I didn't hear anyone knock at the door at 9:00 yesterday evening改错给我理由，敲门是瞬间的，hear sb do，应该没错啊 关于knock at the door.为什么不是knock the door? at表示什么? 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? Please knock on the door before _into the Office.进办公室前请敲门 翻译 they were i______ by a knock at the door Listen!There's someone_____(knock)at the door. Listen!There's someone_____(knock)at the door. Please ____(knock)at the door when you come in. there is a __(敲门）at the door