求助!!没有教不好的学生,只有不会教的老师（这句英文版怎么说）

还没看过英文版的。不过我认为可以这样说：

There are no weak students but only unqualified teachers.

There are the sts can not been taught , only the teacher do not know how to teach.

There are the sts can not been taught , only the teacher do not know how to teach

failed student only comes from unskillful teacher.