Please knock at the door before coming i____the meeting room

please knock at the door before you enter the room（同义句转换） Please knock at the door before you enter the room .(同义句转化)) 同义句转换Please knock at the door before you go into the room ______ at the door before you enter my room, please. A．Knock knock at the door before entering please句中只有KNOCK AT 一个动词?en ______ at the door before you enter my room,please. you should knock at the door before you the room.为什么用enter而不 You should knock at the door before you you _____ the room.【 ——at the door before you enter my room A knock B knocking Ck knock at the door before entering please这句话是时间状语从句吗? 英语改错 “Please knock the door before entering.” knock at the door