| 释义 |
must not ： do not have to--678
must not 是 must 的否定形式，作“不许”或“不要”讲，表达禁止（参见词条 P.679 ）； do not have to 是 have to 的否定形式，作“不一定”讲，含有“大可不必”的意境色彩。
比较：
YOu mustn't tell George. 你不能告诉乔治。（＝ Don't tell George. ）
You don't have to tell George. 你不一定要告诉乔治。
（ =You can if you like but it isn't necessary. ）
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