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		Techniques and methods in Language Teaching > I need your help for  this....     
			
		 I need your help for  this.... 
		
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 fluca
 
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							| I need your help for  this.... 
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							| I didn �t understand the use of the apostrophe in this sentence, "So you �re only getting about four hours � sleep?" Someone can help me, please? |  2 Jul 2012      
					
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 maryse pey�
 
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							| This is the possessive apostrophe, the genitive as "4 hours" is considered as a period, a length of time so the genitive is correct here.   a 4 hours � sleep = he has been sleeping (or  �he slept) for 4 hours.   Hope this is clear enough and could help. |  2 Jul 2012     
					
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 ueslteacher
 
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							| that �s the case of an inanimate possession which is generally substituted with an of-phrase and is considered incorrect but with the time and measurements it �s acceptable and absolutely correct. four hours - is plural, so according to general rules of the use of possessive, the apostrophe goes after the plural ending "s" and no "s" is added and sleep here is a noun, so it means sleep which lasts four hours= four hours � sleep Other examples: a ten days � trip a good night �s sleep in a month �s time (i.e. in one month) a twenty minutes � walk 
 Sophia |  2 Jul 2012     
					
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 koala_eukaliptus
 
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							| It �s been a hard day �s night, and I �ve been working like a dog... A BEATLES � SONG!!!   Another option without the saxon genitive would be   A FOUR-HOUR SLEEP, in this case hour is in the singular because it is functioning as an adjective.  |  2 Jul 2012     
					
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 treasure0911
 
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							| I �m a bit confused. I thought it was: a ten-day trip, a four-star restaurant or a two-hour drive
 
 what �s the difference then?
 
 |  2 Jul 2012     
					
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 yanogator
 
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							| Generally, we don �t use "a" with this possessive form.   I took a two-hour nap. I was operating on two hours � sleep. I was operating on two hours of sleep.   All three of these are common usage.   Bruce |  2 Jul 2012     
					
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 Wariosen
 
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							| Hi, it �s similar to say "quatro horas de sono" the genitive ( hours � ) in this case replaces "de". I hope this helped you. |  2 Jul 2012     
					
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 ueslteacher
 
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							| Sorry, Bruce is right, we don �t use "a" with plural possessives like that, my mistake. Sophia |  2 Jul 2012     
					
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