could you tell me that we will plant trees?这句话为什么不对?

问题描述:

could you tell me that we will plant trees?这句话为什么不对?
RT

that ---whether
之所以要改为whether 是因为 Could you tell me..."能否告诉我.”这个上文暗示着说话者肯定有不知情的事,故用“是否 whether 或者 if"