连字符,前面加不加冠词?

题目

连字符,前面加不加冠词?
比如 ask two days' leave 请两天假
如果改成 连字符 作形容词那个情况
ask a two-day leave 还是
ask two-day leave .加不加冠词 A
..了解下 那个才对?还是都说的通

答案

加的
two-day,形容词,例如a two-day trip 2天的旅程
two days,词组,2天
two-days,错误
two day 错误