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:学生作业学帮网 编辑:学帮网 时间:2024/07/07 01:23:55

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