This is the best way I can think of the problem.我觉得可以用to solve ,但老师说solving
问题描述：
This is the best way I can think of the problem.我觉得可以用to solve ,但老师说solving
答
to be solved或者是solving可选项只有这两个，I can think of 不可以作后置定语吗？也就是说：This is the best way to solve the problem that i can think of.那个to solve没有表示出问题的解决是被动的，solving和to be solved有被动的意思而在你的句子中，主语是way，而不是原句中的problem