h how often does he exercise?how often do he exercise?区别在哪

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hhowoftendoesheexercise?howoftendoheexercise?区别在哪hhowoftendoesheexercise?howoftendoheexercise?区别在哪hh

h how often does he exercise?how often do he exercise?区别在哪
h how often does he exercise?how often do he exercise?
区别在哪

h how often does he exercise?how often do he exercise?区别在哪
how often does he exercise?他多久锻炼一次?
how often do he exercise?病句
所以二者无法比较的,如果硬要谈区别的话,那就是第一句是正确的,第二句是有语法错误的

exercise 有两个意思,
1、动词,锻炼
how often does he exercise? 就是作动词
2、名词,练习
how often do he exercise?就是作名词,do exercise做练习