七年级下册出现这样的短语,over the weekend,on weekends,at the weekend 请问这

七年级下册出现这样的短语,over the weekend,on weekends,at the weekend 请问这 on weekends=at the weekends吗?或是on weekends=at the weekend还是o 区别at the weekends,on the weekend,at weekends,on weekends 我要北 一下短语有什么用法区别?At weekend.On weekend.At the weekend.On the week on the weekend 和over the weekend的区别 over the weekend与on the weekend的区别! in the weekend on the weekend over the weekend un at the weekend,on weekends,on the weekend有什么区别 on weekends与at the weekend意思相同吗 "on the weekend" or "at the weekend" at weekends和at the weekend 区别 on weekends以及on the weekend 区别