I never get up early on Sundays.为什么Sunday后面要加s

I never get up early on Sundays.为什么Sunday后面要加s it was sunday,a never get up early on sundays.sunday为什么要加S It was Sunday.I never get up early on Sundays.为什么是get而非got? 英语翻译It was Sunday.I never get up early on Sundays.I sometime lt was Sunday.I never get up early on Sundays.I sometimes st It was Sunday.I never get up early on Sundays.I sometimes st 英语翻译It's sunday.I don't get up early on Sundays.Sometimes I i __(never/need )get up early on sundays. I never get up early on sundays.这句话为什么用on ,不用in或at? It was Sunday.I never get up warly on Sundays.为什么上面的两个“星期天”其 I need never get up early on Sunday 与I never need to get up gets up early 为什么要在"get"后面加"s"