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My problem is about the possessive s (the ownership s) not that ending-s.

For example, we say, America's Flag, here the America has gotten one ownership s that is America is the owner of that Flag. And also we say, Computer Science, here that Computer doesn't get the ownership s (why?) even though we talk about Science which is of Computer (here).

My question is when we should add that s to the end of the first name which appear to be the owner of the second name? Or how we can recognize what names get that s, please?

oerkelens
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3 Answers3

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That is because computer is used adjectival to science.

You could say that the noun computer "acts as" an adjective.

It is the same thing that happens in other compound nouns, like

history teacher
ticket office
race horse

Actually, the science does not belong to the computer (my computer is unable to show me any science that it possesses!) but rather, the science is about computers.

Whenever in doubt, ask yourself if you are actually expressing ownership. If not, there is no s:

John's store is a candy store. (John owns the store, candy does not own the store.)
Pete's prize is the Nobel Prize. (Pete won the prize, but Nobel gave his name to it)

Gary
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oerkelens
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  • English didn't always work this way; before 1900 it could have been historical teacher and computational science. See Ngram (but still ticket office and race horse). – Peter Shor Jun 18 '14 at 17:30
  • @oerkelens: Thanks for your answer, but, a question: Consider these two, Government road and Bank's computer. I don't know how to determine which one (Government or Bank) should give that s. – user3724662 Jun 19 '14 at 07:10
  • Does the road belong to the government, or is it named after it? Does "Bank" own the computer, or is it a computer designed in a "Bank" way? – oerkelens Jun 19 '14 at 07:27
  • Why the road doesn't belong to the government!? It does I think. – user3724662 Jun 19 '14 at 07:33
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    Yeah, as in "the government owns everything". But then you shoul name all roads the same. The reason to call it "government road" is not that it belongs to the government, but you name it in honour of the government. Or possibly, because of a major government building being located there. Compare to "Station street". Not owned by the station, but the station is probably somewhere on the street. – oerkelens Jun 19 '14 at 07:37
  • I can't figure out what you mean. It's not clear for me. But, I appreciate your trying to help me. Probably there isn't any general and obvious rule for that! – user3724662 Jun 19 '14 at 13:50
  • Yes, the rule is clear and obvious! Say that my name is John, and I buy a road. Then that road becomes John's road. That is not the name of the road, it just says that it is my property. Now, I may name the road "Mary Road", without the possessive. I name the street after her, I do not give it to her. You only use a possessive s to indicate that something or someone _possesses something. A computer does not possess computer science, a race does not _possess a race horse, Mandela does not possess Mandela Square. in all those cases, you do not use a possesive s. – oerkelens Jun 19 '14 at 13:53
  • @user3724662 - it is better to move his to the ELL version of this question anyway, because it really fits better there. If needed, I will expand my answer there to make it clearer :) – oerkelens Jun 19 '14 at 13:56
  • OK, I move there. – user3724662 Jun 21 '14 at 05:39
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In the case of Computer Science, the science doesn't belong to a computer. The word "computer" here is being used as a modifier - effectively an adjective - to make the word science more specific.

Simon B
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Indefinite names don't get possessive s (the ownership s).

Like Computer Science. (Computer is indefinite).

Definite names (like proper names) get possessive s (the ownership s).

Like America's Flag. (America is Definite).


Edits:

"What about "the cat's pajamas"? – Samuel Edwin Ward"

Me: Well, the cat is definite name, because you use "the" article before that.