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		Grammar and Linguistics > Is there a coma?     
			
		 Is there a coma? 
		
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 szamoca
 
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							| Is there a coma? 
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							| Good morning!
Please tell me where should I put a coma in this sentence, before who?   The book which is a bestseller is written by Nathan Davis who has written ten novels. Thank you! |  9 Oct 2009      
					
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 supereme
 
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							| Good morning !!   you should put the coma here: by Nathan Davis, who...   Cheers |  9 Oct 2009     
					
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 alien boy
 
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							| I �d be inclined to put commas in the following positions: 
 The book, which is a best seller, is written by Nathan Davis, who has written ten novels.
 
 There are two relative clauses - one about the book & one about the author.
 
 Regards,
 AB
 
 |  9 Oct 2009     
					
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 mokus19
 
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							| I think AB is right! I should use the commas in the same places... |  9 Oct 2009     
					
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 vickyvar
 
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							| I think I �d write it this way: 
 The book which is a bestseller is written by Nathan Davis, who has written ten novels.
 
 I wouldn �t put the first relative clause in commas as it is defining and necessary to understand which book you are talking about. The second one is a non-defining clause, thus can be put in commas, as it only gives some extra information about the author.
 
 Hope this helps and you can also look up defining - non-defining relative clauses.
 
 |  9 Oct 2009     
					
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 alien boy
 
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							| vickyvar has made a good point! 
 However it really does depend on
the context within which tha statment is made as to whether it is a
defining or non-defining clause.
 
 The first relative clause would be defining if we knew there was more than  one book as an option.
 
 i.e. The book which is a bestseller (as distinct from any other books that are not bestsellers) is written by Nathan Davis, who has written ten novels.
 
 This does seem, however, very unnatural to me as a native speaker! I �d expect to hear or read it:
 
 The book is a best seller written by Nathan Davis, who has written ten novels.
 or
 This book is a best seller written by Nathan Davis, ....
 
 edit: However, when the commas are inserted as per my original post, it then becomes a natural native English expression.
 
 The construction  �The book which is a bestseller � sounds/reads like someone who is not a native speaker. After I take care of some other pressing issues I �ll try & find a reference from Swann to add to the discussion.
 
 Cheers,
 AB
 
 |  9 Oct 2009     
					
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 szamoca
 
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							|   Thanks for your quick answers. |  9 Oct 2009     
					
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 mjotab
 
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							| I agree with alien boy, I think "which is a bestseller" is non-defining too. I am not a native, but it would be the same in Spanish. |  9 Oct 2009     
					
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 ozquivir
 
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							| Both are acceptable and totally correct |  9 Oct 2009     
					
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 aaelaim
 
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							| The best answer is answered by Alien Boy |  9 Oct 2009     
					
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