on weekend在周末
What about working on weekend?
你觉周末工作怎么样?
I frequently play tennis on weekend.
周末的时候我常打网球.
at weekend在周末
I like to take some energetic exercise at weekend.
我喜欢在周末做些剧烈运动.
What is wrong with my friends visiting me at weekend?
我的朋友们周末来看我有什么不对?
以上可换用.
in the weekend：在周末
I don't work in the weekend.
我周末不工作.我周末不工作.
I never go to the cinema in the weekend.
我周末从来没有去电影院.
I finally got settled in the weekend ,It's pretty nice.
这个周末终于安顿下来了,挺好的.
这个也有,但不如前两个常用.