Sundays是泛指每个星期天,而Sunday是星期天

sundays是用一般现在时

sunday看情况的

相关介绍

We are hoping for good weather on Sunday.

我们盼望着星期天天气好。

We went for a cycle ride on Sunday.

我们星期天骑自行车去兜风了。

It's a bit thick expecting us to work on sundays.

想让我们在星期日也工作，可真不像话。

We have had poor weather these past few sundays.

几个星期天都赶不上好天气。