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If I want to describe a car owned by Peter, I will say "Peter's car".

But how do I describe the car his teacher owns? "Peter teacher's car" or do I have to be descriptive: "the car of Peter's teacher"?

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up vote 10 down vote accepted

Don't forget your apostrophes to indicate possession.

I would say "Peter's teacher's car" is fine. You could even extend it to "Peter's teacher's car's seat's cushion" if you wanted, but it isn't very elegant.

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I though that possession is written without apostrophe. From the basic example it's (it is) vs. its (something belonging to it). – Let_Me_Be Aug 11 '11 at 13:58
@Let_Me_Be: That's one of the exceptions to the rule. – Mr. Shiny and New 安宇 Aug 11 '11 at 14:09
@Let_Me_Be: the apostrophe in "it's" (it is) is to indicate the omission of the second letter i. As Mr. Shiny and New said, the possessive "its" is an exception to the rule and hence the apostrophe is omitted, despite it indicating possession. – Sir Crispalot Aug 11 '11 at 14:35
@Let_Me_Be: Other exceptions include "their" instead of the incorrect "they's", and "our" instead of the incorrect "us's". – oosterwal Aug 11 '11 at 16:47

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