Phrase
may not
verb
不可以
In use
You may not park here between 8 a.m. and 6 p.m.
Students may not leave the classroom during the quiz.
Visitors may not feed the animals in the zoo.
may not + verb
表示禁止，语气较强。
You may not park here.
你不得在此停车。
may not + be + adjective/noun
表示可能性，推测某事不成立。
This may not be true.
这可能不是真的。
may not have + past participle
表示对过去某情况的不确定推测。
She may not have seen the message.
她可能没有看到那条信息。
Common mistakes
She may not speak English.She cannot speak English.
may not表示不允许或可能性，不表示能力不足。表示能力缺失要用cannot。
May not I come in?May I not come in?
否定疑问句中not应放在主语之后，而非情态动词之前。询问“不可以吗”应用May I not...？
Connections
Learner notes
Grammar Note
may not 表示'不可以'，用于否定许可或可能性。
Dictionary facts from BridgeDict normalized sources.