半年和一年半分别怎么表达？

Question

如题所述

Answer 1

半年
half ayear
一年半
a/one year and a half.

Answer 2

half a year
one year and a half

Answer 3

half a year
a year and a half

Answer 4

half year and one and a half year

Answer 5

half a year
one and a half year