明明的妈妈59岁用英语可以说成"Ming Ming's mother is 59 years old."

其中，"Ming Ming" 是名字，"mother" 是母亲，"is" 是动词"是"的第三人称单数形式，表示现在状态，"59 years old" 是形容词短语，表示年龄。

例句：

"Ming Ming's mother is 59 years old and she is still very active."
(明明的妈妈59岁，还很积极。)
"Ming Ming's mother is 59 years old, but she doesn't look a day over 50."
(明明的妈妈59岁，但她看起来50岁都不到。)
"Ming Ming's mother is 59 years old and she has been working as a teacher for 20 years."
(明明的妈妈59岁，她已经当了20年的老师。)