eunkum Do I have to say " their business plan"? Or do I have to say "their business plans"? their office?
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eunkumDo I have to say " their business plan"? Or do I have to say "their business plans"? their office? or their offices?You don't have to use a plural after "their", if that's what you're asking. "their" is simply "belonging to them". All that matters is how many things belong to them.