How many days off do you have in a week?
我觉得句子 语法和结构上都是可以的吧？
How many days are you off in a week?
这个句子 有这么用的吗。谢谢
How many days do you have off in a week ?
这句话行吗？谢谢
一、day off 表示“休假”，常用作 have 或 take 的宾语。比如想说“我一周休假两天”，可以用——
I have (two days off) in a week
I take (two days off) in a week
把它改为一般疑问句则为——
Do you have (two days off) in a week?
Do you take (two days off) in a week?
如果用特殊疑问句就 two 提问——
(How many days off) do you have in a week?
(How many days off) do you take in a week?
二、be off 的意思是“离开”，如：
I am off for two days in a week. 我一周离开两天。
Are you off fpr two days? 你一周离开两天吗？
How many days are you off in a week (for)？ 你一周离开几天呢？【for 可以省略】
How long are you off in a week? 你一周离开多久呢？
三、由于 day off 或days off 是一种紧密结构， off 是形容词，表示“休歇的/空闲的/不工作的”， 这里是 day 的后置定语，a day off 也可以说 an off day。off 和 day 不能分开，因此，
How many days do you have off in a week? 是错误的。