请问这句话有没有错误、有的话 请问要怎样改
问题描述：
请问这句话有没有错误、有的话 请问要怎样改
But i am sure my understanding of courage will more and more as my growing.
答
成分残缺
But i am sure 【（that ）my understanding of courage will be more and more as my growing.】
【】是从句
从句缺少谓语动词be