You have a minute？ / Do you have a minute？

You have a minute？ I want to discuss this issue with you.

你現在有空嗎？我想和你討論一下這個問題。

Are you available？

available 在此的意思是「可會見的、可與之交談的」，由此衍伸為「有空的」；沒空就是 「not available」

- Are you available？ I need your help.

-Sure.

-你有空嗎？我需要你的幫忙。

-當然可以。

Can you spare some time？

spare 有「抽出、勻出」的意思

-Can you spare some time to come out with me？

-Sorry， I‘m afraid （I can’t）.

-你有空和我出去嗎？

-抱歉，我恐怕沒空。

When will you get around to doing sth？ / When did you find time to do sth？

-When will you get around to traveling？

-Maybe next week.

-你什麼時候有空去旅游？

-下星期吧。

When you time off？

have time off 表示 「有空」

Finally， I have time off to go downtown and shop.

我終于有時間去市中心購物了。