be sure to

• 必定, 一定

be sure to的用法和样例：

例句

1. Be sure to place them correctly.
   务必把这些东西放对地方。
2. Be sure to lock your bicycle.
   自行车务必上锁。
3. Be sure to get the work finished before six o'clock.
   务必在六点之前把工作完成。
4. Be sure to sweep the room clean.
   一定要把房间打扫干净。
5. As to marriage or celibacy, let a man take which course he will, he will be sure to repent.
   要结婚还是独身，让男人照自己的意思去做吧，他一定要后悔的。
6. Be sure to clear off the rubbish.
   一定要清理垃圾。