题目内容：

I will come up with three approaches that useful to solve this problem.这句话对吗?
that那里我不确定

优质解答

这句话语法不对,稍微改就对了：I will come up with three approaches that are useful in solving this problem.但我建议你考虑这个更简洁的说法：I will come up with three approaches for solving this problem....