以下是一些使用"mustn't"的句子示例：
You mustn't leave here.你不能離開這兒。
You mustn't go swimming today.今天禁止你去游泳。
You mustn't drive so fast.你不能開這麼快。
Keep down! You mustn't let anyone see you.蹲下！一定不要讓人看見你。
You mustn't leave the gate open.你一定不要讓大門敞開著。
You mustn't say things like that.你千萬別說那樣的話。
I mustn't be late or Dad will go up the wall.我不能晚了，否則爸爸會發脾氣的。
We mustn't let these minor details obscure the main issue.我們不能讓枝節問題掩蓋主要問題。
You mustn't pick the flowers.你不準摘花。