"on the weekend" or "at the weekend"

on the weekend or at the weekend () the weekend in or on? 我们说 on weekend ,at weekend,还是in the weekend 一下短语有什么用法区别?At weekend.On weekend.At the weekend.On the weekend. i don't go to school on saturday or sunday,改为同义句用at the weekend还是 on weekend谢谢详解 I've never seen him talking to his friends on the phone or going out with anyone on weekend 关于on weekend和on the weekend的问题是on weekend还是on the weekend,还是两者都可以? on weekends以及on the weekend 区别 on the weekend 和over the weekend的区别 over the weekend与on the weekend的区别! at the weekend 和 on the weekend的区别 应该用on the weekend 还是 in the weekend? at weekend,on weekend,at the weekend ,on the weekend和on weekends的区别?尽量详细些... in the weekend on the weekend over the weekend unin the weekendon the weekendover the weekendunder the weekend那个对? 是 in the weekend 还是 on thr weekend 如题. on the weekend和at weekend用法一样吗? 是on weekday还是on the weekday是on the weekend 还是on weekend急 on the weekend/ in the weekend/ at the weekend.三个短语怎么区别?