八个半小时翻译成英语！！！

eight half hours

half 用于一个或一个以上整数再加一半表示“几个半”时，用“ one （two … ） + 名词 + and a half ”或“ one （two … ） and a half + 名词”结构，要注意名词复数形式的变化。如：

一个半小时 one hour and a half / one and a half hours
八个半小时 eight hours and a half / eight and a half hours

eight hours and a half

或者 eight and a half hours

eight hours and a half

eight hours and a half
eight and a half hours
都可以

eight hours and a half或者eight and a half hours