It is a pity that you should have to leave.这句话中为什么要用should have to do?should的虚拟语气或者说“本应该做而没有做”是should have done，但这里的should have to do怎么解释？

but it is a pity that...yisi ________ we can't join in the party．A.It is a pity B.That is a pity C.It is a pity that D.It is pity what a pity 和 that is such a pity 和it is a pity 是不是都可以?shame的几种用法,我也想知道一下. what a pity 和 it is a pity 的区别 It Is a Pity that It Is not you啥意思 It's a pity that know you. It's a pity that you are Revenge is innate in women.But it is a pity that i was a tomboy It is a pity (that) he can't come.这句话 that能省略? It is a pity that?(原句是：What a pity it is that you didnt arrive by day )It is a pity that?(原句是：What a pity it is that you didnt arrive by day 中的that you didnt arrive by day 是that 引导的主语从句吗? It is a pity.（感叹句）------ ----- -----. But it is a pity that you can't change the past是不是病句? That you couldn't come is a pity.用it作形式宾语 It is a pity that i did not think of ringring you earlier.中文意思. 分析语法it is a pity that he should have to leave . It is a pity that we have no opportunity to meet这句话是什麼意思 There is a thing that is the first to pity and the last to help.What is it? 关于It is +adj +that这个句型的问题为什么有It is a pity that It is 后面不是应该加形容词吗?a pity是名词吧