Hi teachers,<br/><br/>I have a question regarding the possessive form in English.<br/><br/>Usually, one adds 's or just the apostrophe to indicate a possession:<br/><br/>Penny's house<br/>Leonard's dog<br/><br/>I have also seen forms where the possessor is used as an adjective:<br/><br/>Google headquarters instead of Google's headquarters.<br/><br/>Is there a rule for this?<br/><br/>(I'm French, so sorry is this is a dumb question :-)...)