______ at the door before you enter my room,please.

______ at the door before you enter my room,please. ______ at the door before you enter my room, please. A．Knock 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)) ——at the door before you enter my room A knock B knocking Ck you should knock at the door before you the room.为什么用enter而不 Koock at the door before enter the room 中enter要不要变形? 同义句转换Please knock at the door before you go into the room ____ at the door before entering,please You should knock at the door before you you _____ the room.【 you must ____(knock)on the door before you enter always knock on the door before you enter