# Why is it that score is used in singular when referring to several groups of 20?

If I'm not mistaken, score can mean "a group or set twenty".

What I don't understand is why you say for example "Four score and seven years ago...", instead of saying "four scores" (since there are four groups of twenty years).

The word score follows the same rule that applies for the words dozen, hundred, thousand and million. When they are used with a number to denote exact quantity, their form doesn't change, e.g. we say two hundred, ten thousand, three dozen, five million.

The plural form with these words is used when the number denoted isn't exact and we just want to emphasise the fact that there are many items, e.g. hundreds of years ago, dozens of times, etc.

It's the same reason we don't say "Two hundreds dollars". The number, whether twenty or eleven thousand three hundred, refers to the years, not to the 'groups of years'. Nobody would say *four tens years; you can say four decades, precisely because a decade is ten years. But a score is just twenty and cannot (in this sense) be pluralized.

• Thank you for your reply. You've mentioned the case that I had in mind. I got confused thinking that if Lincoln had used in his speech the term decade instead of score, he would have used the plural form. Your answer, as well as the one given by Irene, make the difference between those words clear. Commented Jan 15, 2012 at 21:03

Sorry to piggy-back on an old question. But this one has all the foundation for mine, so...

Mine is this: do we, or do we not, use "of" with score. I always want to put "of" in, which sounds right to my ear--but sounds wrong according my understanding of the word's usage:

a dozen doughnuts
a score (of?) doughnuts

Two score sheep blocked the road.
Two score of sheep blocked the road.

• Please don't post new questions as answers to other questions. You can use the "Ask Question" button on the homepage to create a new question and you can link to this question for context. Commented Feb 15, 2022 at 21:14
• If you have a new question, please ask it by clicking the Ask Question button. Include a link to this question if it helps provide context. - From Review Commented Feb 15, 2022 at 21:30