(1)检查。基本意思。check our baggage 检查行李

Could you check for me who borrowed it?

你能帮我查查是谁借走了吗?

Did you check the power plug and press the play button?

你是否检查了电源插头并按了播放键了呢?

(2)登机台。check-in counter

extremely

使用频率非常高，不亚于very，这个东西extremely expensive。

The speech the blind girl gave this evening was extremely moving.

今晚那个盲人女孩的演讲非常感人。

Is this the check-in counter for Flight 914 to Los Angeles?

这是飞往洛杉矶的914号航班的登机台吗?

(3)询问。check on it 问问看

Maybe I should call to check on it.

也许我应该打个电话问问看。

(4)支票。

Sign the check.

签这张支票。