couldn't是can't的过去式吗
2个回答
couldn't可以是can't的过去式,也可以单独用.单独用时意思与can't差不多,但语气更委婉一些.
相关问题
couldn't 是can't的过去词吗?
can't的过去式
It couldn’t be better 为什么用过去式
请问英语过去式的语法Why couldn't he decide
can't与couldn't区别,
用couldn't/can't/mus
can't和couldn't区别?
can't/couldn't have的意思
用can、can't、could、couldn't、may填空
musten't是must过去式吗