不得

(ｂùｄé) must not; may not; not be allowed

♦ ~将参考书携出阅览室。 Reference books may not be taken out of the reading room.

♦ ~有误。 Let there be no mistake.

不得
(ｂｕｄｅ) (used after a verb) must not

♦ 去~ must not go

♦ 马虎~ mustn't (or can't afford to) be careless

♦ 这件事你做~。 You must never do this.