Mollusilly.的回答：

a two-week holiday a two weeks' holiday two--week是形容词 two weeks是名词

Mollusilly.的回答：

a two-week holiday a two weeks' holiday two--week是形容词 two weeks是名词

Mollusilly.的回答：

a two-week holiday a two weeks' holiday two--week是形容词 two weeks是名词

Mollusilly.的回答：

a two-week holiday a two weeks' holiday two--week是形容词 two weeks是名词

黄光汉的回答：

a two-week 作定语，修饰名词。 two weeks是时间短语。