what a fine day,isn’t it?这句话对吗

what a fine day,isn’t it?这句话对吗

what a fina day （it is）?
问号表 感叹 是一种省略 不是反问

没错。
what a fine day是感叹句，完整形式是What a fine day it is，也就是it is a fine day加感叹词what倒装而成。所以反意疑问句自然是isn't it。

yes,right

对的
what a fine day(it is),isnt it
how fine is it today

对的

that's correct