有空的時候，請過來玩兒。

When you have free time, please come and play.

Source: Tatoeba

Sentence Composition

1 有空 yǒukòng to have time (to do sth)
=2 的 de
  1. of; ~'s (possessive particle)
  2. (used after an attribute when it modifies a noun)
  3. (used at the end of a declarative sentence for emphasis)
  4. (used after a noun, verb or adjective to form a nominal expression, as in 皮革的 pígéde "one made of leather" or 跑堂儿的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. dì or di in poetry and songs
=2 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=2 的 dí really and truly
=2 的 dì (bound form) bull's-eye; target
3 時候 shíhou
  1. time
  2. length of time
  3. moment
  4. period
=4 請 qǐng
  1. to ask
  2. to invite
  3. please (do sth)
  4. to treat (to a meal etc)
  5. to request
=4 請 qīng only used in 請室／请室 (qīngshì)
=5 過來 guòlái
  1. to come over
  2. to manage
  3. to handle
  4. to be able to take care of
=5 過來 guòlai see 过来 guòlái
6 玩兒 wánr
  1. to play
  2. to have fun
  3. to hang out