--is John coming by train?--he should,but he****not .he likes driving his car.can与may的区别及用法

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--is John coming by train?--he should,but he****not .he likes driving his car.can与may的区别及用法

--is John coming by train?--he should,but he****not .he likes driving his car.can与may的区别及用法
--is John coming by train?--he should,but he****not .he likes driving his car.
can与may的区别及用法

--is John coming by train?--he should,but he****not .he likes driving his car.can与may的区别及用法
这里是may,表示可能;这句话的意思是,约翰会乘火车来吗?他应该,但是他可能不会乘火车,毕竟他比较喜欢开车.can not 的话则说明他不能够开车,这与事实相矛盾.

在这题中can与may表猜测的, can not 表不可能(倾向与有证据表明一定不会) may not表可能不(也可能会 不肯定的猜测)