1. To knock at/on 敲，击

I knocked at the door three times but nobody answered.
我敲了三下门但没人应门。

Someone was knocking on the window.
有人在敲窗户。

2. To knock around 漫游

He spent a few years knocking around Europe.
他花了几年时间漫游欧洲。

The college student knocked around the United States during his summer vacation.
那位大学生在暑假期间漫游美国。

3. To knock sb. down 打倒（撞到）某人

She was knocked down by a bus.
她被一辆公共汽车撞倒在地。

The boxer knocked his opponentdown twice in the first round.
拳击手局就击倒对手两次。

4. To knock sth. down 推倒（拆掉、拆毁）建筑物

These old houses are going to be knocked down.
这些旧房子要拆了。

They knocked down the old factory to build a new one.
他们拆掉旧的工厂以兴建新的厂房。

5. To knock off 停止某事，中断某事，（尤指）下班，收工

Do you want to knock off early today?
你今天想早点下班吗？

Let’s knock off for lunch.
咱们收工吃午饭吧~~

6. To knock out 使入睡，昏睡，不省人事

Sam was drunk and knocked out his friend who stopped him from drinking.
山姆喝醉了，他一拳打昏了阻止他喝酒的朋友。

使大吃一惊，给某人留下深刻印象

The girl in the bikini knocked out the guys on the beach.
那些穿着比基尼泳衣的女孩倾倒了沙滩上的男士们。

完成

Tiffany knocked out three columns overnight.
蒂芬妮一夜间完成了三个专栏。

7. To knock up 使怀孕

She got knocked up when she was on holiday.
她在放假的时候怀孕了。

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