他用了六个月去完成这个课程。

Tā yòng le liù gè yuè qù wánchéng zhè gè kèchéng.

He used six months to complete this course.

她女儿六岁了。

Tā nǚ'ér liù suì le.

Her daughter is six years old.

我的孩子六岁。

Wǒ de háizi liù suì.

My kid is six years old.