"She has excellent grades" 或者 "She is an excellent student" 是表达她成绩优秀的常用说法。

"Grades" 是成绩的意思，"excellent" 是形容词，表示非常好的。 "Student" 是学生的意思。

例句：

She has excellent grades in all of her classes.
她在所有课程中成绩都非常好。
She is an excellent student and always works hard.
她是一个非常优秀的学生，总是努力工作。
Her dedication to her studies has earned her excellent grades.
她对学习的奉献已经赢得了优秀的成绩。