Question

on weekends、at the weekends、at weekends、on the weekends有什么区别

Answer 1

看看下面的列子你可能清楚点。
at weekends （＝<美>on weekends）在周末1. I often go to visit my aunt at weekends. 我常在周末去看望我姑母。 2. He likes to watch farces at weekends to relax himself. 他喜欢在周末看滑稽剧来放松自己。 3. I will be at liberty only at weekends. 我只有在周末才有空。 4. Discipline is often relaxed at weekends. 一到周末纪律往往松弛下来. 5. He likes to go climbing at weekends. 他喜欢在周末做登山运动. 6. We love to get out into the countryside at weekends. 我们周末爱到郊外去玩儿. 7. I often fish/go fishing at weekends. 我常在周末去钓鱼. 8. They like to go ballooning at weekends. 他们周末喜欢乘气球玩. 9. He has to work at weekends. 他须在星期六和星期日工作. on the weekend ad. 周末1. You may go grass skiing, bicycle riding, or shopping on the weekend. 周末你可以去滑草，骑脚踏车，或购物。 2. We had a good time on the weekend party. 我们在周末聚会上玩得很快乐。 3. The club got all the members together on the weekend. 俱乐部使全体成员在周末举行了一次联允。

Answer 2

at weekends （＝<美>on weekends）在周末