1.Saturday指的是一个星期的最后一天,即“星期六”,可用作可数名词,也可用作不可数名词。
2.表示“在星期六”时通常用介词on,在非正式语体中,尤其是美式英语中,常可省去介词on,直接用Saturday作时间状语; 当Saturday前有next, last, this, that, some, every等修饰语时,前面也不用介词on。
3.在Saturday后有next, last等修饰语(也称“后置定语”)时,尤其在英式英语中,通常不省略介词on,而在美式英语和非正式文体中,介词on则可有可无。
4.Saturday在仅指日历中周期性的日期时,通常不用冠词,但表示某指定的日期时可加冠词a或the。Saturday在与冠词连用作时间状语时总是要与介词搭配。
5.Saturday的复数形式可表示“每星期六”。
6.Saturday可置于其他名词前作定语。

His principles wouldn't allow him to work on Saturday.他的原则不会允许他在星期六工作。
We can visit you on Saturday or Sunday; our plans are fairly flexible.我们可以星期六或星期日去拜访你,我们的计划是较灵活的。
They attended class on Saturday.他们星期六上课。
I hope to go shopping on Saturday next.我希望在下星期六去购物。
He went abroad last Saturday.他上星期六出国了。
The new law is applicable from next Saturday.新法律下周六生效。
The bill will fall due next Saturday.这张账单下星期六到期。
They will have a holiday this Saturday.这个星期六他们放假。
John devotes every Saturday afternoon to fishing.约翰每个星期六下午去钓鱼。
The Saturday night rally in the stadium was rained out.星期六晚上在体育场举行的集会因下雨而取消了。

［词源］  ＜Satur(农神)