你们今天下午有空吗？

Are you free this afternoon?

Are you guys free this afternoon?

Source: Tatoeba

Sentence Composition

1 你们 nǐmen you (plural)
2 今天 jīntiān
  1. today
  2. the present time; now
3 下午 xiàwǔ
  1. afternoon
  2. p.m.

classifier: 個
4 有空 yǒukòng to have time (to do sth)
=5 吗 má (coll.) what?
=5 吗 mǎ used in 吗啡 mǎfēi
=5 吗 ma (question particle for "yes-no" questions)