a two-day holiday 与in two years' time有何区别?

问题描述:

a two-day holiday 与in two years' time有何区别?

two-day是一个形容词,这种数字+名词的复合形容词,后面的名词要用单数形式;
two years是一个名字,two years' 是名词所有格形式,后面这个名字要用复数形式.
a two-day holiday 两天的假日
in two years' time 在两年的时间里