关于数词、量词等的关系,例如：下面哪种表达方式是对的：two-hour-ride\two hours ride/two

two-hour ride这种形式是对的,在句中作表语,如
The distance from my hometown to my university is a two-hour ride.
two hours' ride也是对的,在句中作定语,如
It's two hours' ride from my hometown to my university.
其它两种形式是错误的.