at weekend,on weekend,at the weekend ,on the weekend,on the weekends,at weekend和on weekends区别?at weekend,on weekend,at the weekend ,on the weekend,on the weekends ,at the weekends,at weekends和on weekends的区别?

on weeken on the weekend or at the weekend 如何区分at weekend 与 on weekend on weeken(s)什么意思 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. at weekend,on weekend,at the weekend ,on the weekend和on weekends的区别?尽量详细些... at the weekend 和 on the weekend的区别 on the weekend和at weekend用法一样吗? weekday 和weekend用on还是at at weekand 和on weekend的区别 at weekand 和on weekend的区别 at/on weekend的同义词是什么 at weekend,on weekend,at the weekend ,on the weekend,on the weekends,at weekend和on weekends区别?at weekend,on weekend,at the weekend ,on the weekend,on the weekends ,at the weekends,at weekends和on weekends的区别? on the weekend/ in the weekend/ at the weekend.三个短语怎么区别? I waited for my good friend at the bus stop last weekend对my good friend提问_____ _____ you _____ _____ for at the bus stop last weeken? at the weekend,on weekends,on the weekend有什么区别 weekday和weekend前面用in,on还是at