on saturdays是什么时态

　　Most of our swim meets are held on Saturdays.

　　我们大多数游泳比赛都在星期六举行。

　　She goes to an acting school on Saturdays.

　　她星期六去表演学校。

　　We always do the lottery on Saturdays.

　　我们总是在星期六抽奖。

　　The counter is closed on Saturdays and Sundays

　　柜台周六、周日关闭

　　Alex: I do sometimes. I am in a bird-watching group. We go out on Saturdays.

　　阿莱克斯：我有时候会去。我参加了一个赏鸟团体。我们周六会外出。