it's not big deal 与it's not a big deal 还有it's long story与 it's a long story 到底哪个才是对的

问题描述:

it's not big deal 与it's not a big deal 还有it's long story与 it's a long story 到底哪个才是对的
感觉后面的才是对的,可是在网上搜的两个都有,哪个才是俗语

后者是对的
it's not a big deal, 或 it's no big deal
it's a long story.
不可以说 it's not big deal 或 it's long story  这是农民英文.