 
			
				Apr 30th, 2012, 05:57 am
			
			
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      |    Sue   |    |    Join Date: Oct 8th, 2006  Location: Milan  
						Posts: 1,406
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        Re: the grammar of Que Sera Sera       I'm not sure why you think it's unusual - it's a regular structure :    Main Clause   
Subject: The future  
Negated Verb:  is not  
Complement: ours (possessive pronoun)   +  Subordinate (non-finite) clause  
infinitive verb :  to see   
As the subject of a non-finite clause is never explicitly stated, it has to be inferred from the previous clause. When a possessive is involved - whether a possessive adjective as in 1 and 3a below,  a possessive noun as in (2) or a possessive pronoun as in your example and 3b the subject has to be "mentally converted" to the correct form - ours/we, David's/ David etc.      
1. It's your turn to buy the drinks.  (= you buy the drinks) 
2. It's not David's place to criticise. (= David shouldn't criticise the plans) 
3a. It isn't your house to sell  ( = You can't sell the house) 
3b. The house isn't yours to sell ( =You can't sell the house)          |