on sundays和on sunday的区别：中文意思不同、用法不同、侧重点不同。on sundays意思为“在各个星期天”，属于泛指，侧重于不确定的星期天；on sunday意思为“在星期天”、“在周日”，特指某个星期天。
一、on sundays的基本释义及用法介绍
on sundays意为在星期天。当表示“某个星期天”时，Sunday前可加不定冠词a；表示“在星期天”时，一般用介词on，但如果有this，that，last，before，every等词修饰时，不能再用介词on。
例句：If I were asked to work on Sundays, I should resign.
要是叫我星期天加班，我就辞职不干了。
She always went to chapel on Sundays.
她总是在星期天去教堂做礼拜。
We're mostly out on Sundays.
我们星期天一般不在家。
On Sundays, the family went three times to chapel.
每到星期天，这家人都会去做3次礼拜。
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。
The exhibition keeps open on sundays.
展览会星期天也开放。
二、on sunday的基本释义及双语例句
on sunday意为在星期天;在星期日;在周日。Sunday前一般不用冠词，有时可加定冠词thebai表示“所谈到的那一周的星期天”。
例句：Would you like to come for drinks on Sunday?
星期天来参加酒宴好吗？
It's a bit off expecting us to work on Sunday.
让我们星期天上班工作，那可不太行吧。
We are hoping for good weather on Sunday.
我们盼望着星期天天气好。
We went for a bicycle ride on Sunday.
我们星期天骑自行车兜风了。
The festival will climax on Sunday with a gala concert.
星期天的音乐盛会将把这次会演推向高潮。
