She couldn't make mistake on this matter becarse she had tried it many times.could 这儿怎么理解?能用can't

来源:学生作业帮助网 编辑:作业帮 时间:2024/06/07 03:34:28

She couldn't make mistake on this matter becarse she had tried it many times.could 这儿怎么理解?
能用can't

could较为委婉,仍有说错的余地