不允许英语怎么说

不允许用英语可以表达为 "not allowed" 或 "prohibited"。具体语境中，还可以使用以下表达：
- It is not permitted. - This is forbidden. - It's not allowed to do that. - You're not supposed to do that. - It's prohibited from doing so.

不允许可以说成： - Not allowed - Not permitted - forbidden - not to be used - unauthorized - not acceptable