I will come up with three approaches that useful to solve this problem.这句话对吗?
问题描述：
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
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....