How pity it is 和what a pity 有什么区别

意思是差不多的,都是真可惜,真遗憾
区别在于
what a pity(pity在这里作名词)
How pity it is（pity在这里作形容词）
另外附上pity的词汇语法：
pity[ 'piti ]
n.遗憾,同情,可惜
v.同情,怜悯
词形变化:
副词:pityingly 名词复数:pities 动词过去式:pitied 过去分词:pitied 现在分词:pitying 第三人称单数:pities
例句与用法:
1.I pity anyone who has to feed a family on such a low income.
我同情任何需要以如此微薄的收入养活全家的人.
2.It's a pity that you can't come to the party.
你不能来参加这次聚会,真可惜.
3.We took pity on the homeless girl and took her into our house.
我们同情这个无家可归的女孩,让她住进了我们的屋子里.
4.He lay helpless in the street under the pitying gaze of the bystanders.
他零零地躺在路边,旁观的人都投以怜悯的目光.
5.What a pity that you can't come to the theatre with us tonight.
你今晚不能和我们一起去看戏,真可惜.
6.Survivors of the disaster who lost their relatives are much to be pitied.
灾难中丧失亲人的幸存者很值得同情.
7.`Did you insure the jewels before they were stolen?' `No,more's the pity!'
‘你那些被窃的珠宝买保险了吗?’‘没有,真倒霉!’
8.I pity you (ie I am threatening you) if you can't pay me the money by tomorrow.
你明天不把钱还给我,我就不客气了.
名词pity:
1.a feeling of sympathy and sorrow for the misfortunes of others
同义词：commiseration,ruth,pathos
2.an unfortunate development
同义词：shame
3.the humane quality of understanding the suffering of others and wanting to do something about it
同义词：compassion
动词pity:
1.share the suffering of
同义词：feel for,compassionate,condole with,sympathize withEuEEu