2014高考英语高频动词复习：knock短语

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　　knock短语：

　　knock at /on 敲打(门、窗等) knock down 把……撞倒，击倒

　　knock into 撞到，撞上某人，偶然碰见 knock sb out (of sth) 淘汰某人

　　例如：

　　We knocked at / on the door but there was no one there.

　　He was in hospital last night after being knocked down by a car.

　　Tom entered the classroom hurriedly and knocked into Mr. White.

　　He almost knocked into me before he realized it.

　　If no one answers the front door, try knocking at the back door.