睡觉除了go to sleep还有很多不同的说法，每天用一个：

1. hit the hay/sack;

2. go nitey nite;

3. get some shut-eye;

4. knock out;

5. visit the sandman;

6. catch some Z's;

7. off to lala land;

8. go snore now;

9. catch up on some sleep.