must的否定?must的否定是need't还是don't have to?
must的否定?must的否定是need't还是don't have to?
must的否定是否等于don't have to
以must 开头的疑问句,否定回答是 needn't,don't have to可以吗?
请问must的一般疑问句的否定回答可以是:No,I don't have to
need的否定形式need的否定是needn't还是don't need 用法怎么样
must的否定回答是need 还是用must
为什么must的否定既有mustn't又有needn't?那need的否定是什么?
have to,must,do not need,needn't的区别
“must”的反义是不是“mustn't”?为什么“must”开头的句子否定回答是“needn't”?
don't have to 是肯定还是否定?
must的否定形式为什么是can't
must的否定回答可以是mustn't吗