on the weekends,american students don't go to s .P

on the weekends 翻译 on weekends、at the weekends、at weekends、on the weekends有什么区别 on weekends=at the weekends吗?或是on weekends=at the weekend还是on weekends=at weekends 有没有on the weekends at the weekends跟on the weekends的区别 on weekends以及on the weekend 区别 区别at the weekends,on the weekend,at weekends,on weekendsat the weekends,on the weekend,at weekends,on weekends都有些什么区别?各自的意思是什么? All the students relax on weekends.用last weekends改写 英语中是in the morning on weekends 还是on the morning on the weekends? 关于on weekends和on the weekends的问题是on weekends还是on the weekends,还是两者都可以?怎么用?与on the weekend有什么区别? I often surf the I___ on weekends. the girl often h____her mother on weekends. The buses are always (crowd) on weekends. Tony often p_____ the guitar on weekends. THE SUPEMARKET IS ____(CROWD) ON WEEKENDS 有on the weekends吗一般好像听过on weekends和on the weekend是________the weekends呢?at? on weekends on weekends.