Correct

使不得

/ shǐbude /
Strokes

Definition

cannot be used/must not (do sth)/unacceptable

Example

As a Verb

do not work; be useless/unserviceable

1
Zhè
zhī
shǒubiǎo
手表
shǐ
使
budele
不得了
  

The watch can't be used any more.

As a Verb

be impermissible/undesirable; must not be done

2
Míngtiān
明天
yào
kǎoshì
考试
  
,
jīnwǎn
今晚
kàn
diànyǐng
电影
shǐ
使
bude
不得
  

There's an exam tomorrow and we mustn't go to the movie tonight.