上床前，記得關門。

Close the door before going to bed.

Source: Tatoeba

Sentence Composition

1 上床 shàngchuáng
  1. to go to bed
  2. (coll.) to have sex
2 前 qián
  1. front
  2. forward
  3. ahead
  4. first
  5. top (followed by a number)
  6. future
  7. ago
  8. before
  9. BC (e.g. 前293年)
  10. former
  11. formerly
3 記得 jìde to remember
4 關門 guānmén
  1. to close a door
  2. to lock a door
  3. (of a shop etc) to close (for the night or permanently)