我的妈妈是勤劳的用英语怎么说

"My mother is diligent" 说法是正确的。
diligent 是形容词，意思是勤奋的、努力的、用功的。
来源：diligent 这个词源于拉丁语的 "diligentia"，意思是尽心、认真、仔细。
一些例句：
She is a diligent worker, always finishing her tasks on time.
（她是一个勤奋的工人，总是按时完成任务。）
He has a diligent approach to his studies, and always achieves good grades.
（他对学习有勤奋的态度，总是成绩优秀。）
The diligent nurse was praised for her attention to detail and care for her patients.
（那位勤奋的护士因关注细节和关爱病人而受到赞誉。）