you should knock at the door before you the room.为什么用enter而不用enter into

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you should knock at the door before you the room.为什么用enter而不用enter into

enter=go into ,动词,意思是:进入;进来 ,后面直接跟进入的地点,不需要另外加介词into.When you enter a place such as a room or building,you go into it or come into it.例句:1、He entered the room briskly a...