Four days!

Four days! four days before Four days count Hours in four days -days in four weeks 对in four days提问 four- day holiday是否等于four days' holiday? 单词four-day和four days有什么区别? He will be back in four days I am staying just for four days only four days remained _________the exam He has( )(咳嗽)for four days. every other three days =every four days 对不?