He entered without knocking at the door 这句中 knock 后面是不是应该加ed

He entered without knocking at the door 这句中 knock 后面是不是应该加ed Please do not ------without knocking at the door knock at the door 英语单句改错1She entered into the room without knocking at the doo I heard someone _____(knock /knocking) at the door just now ——at the door before you enter my room A knock B knocking Ck try (knocking)at the door once more为什么不填knock? he didn't knock on the door.he entered the room合并为一句 some one is knocking at the door 同义句 —— ——a knock at the doo i seem to hear someone knocking at the door,knocking为什么要加ing There is someone knocking at the door.为什么用“knocking”,要加“ing” knock at the door造句