请问work days 和 working days有什么不同?

work和working有什么不同啊 business days 和 working days 区辨 few days和 several days 有什么区别? two days 和 for two days 有什么区别 three days later和in three days 有什么区别? in working days ,还是on working days weather working days measurement什么意思 three-days与three days有什么不同?如：We’ll have a__ holiday.What abo hard working\working hard\hard work\work hard这四个词之间到底有什么不同? 请问working time 和 hours of work 有什么区别?分别在什么情况下使用, 有these days的句子应该用过什么时态?He ____(work)on the farm these days. These days 用什么时态,和those days有什么区别