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		Grammar and Linguistics > help needed..     
			
		 help needed.. 
		
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 Mariethe House
 
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							| help needed.. 
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							| Plesase can someone give me a formal explanation about the difference between the two present perfects: simple and continuous, especially with for and since!I always find it difficult to "explain" .When I find some reasonable explanation, there�s always an exception! Thank you ! Mariethe.
 
 |  27 Jan 2009      
					
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 nurja
 
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							| The most simple answer is that the present perfect simple focuses on the finished action e.g. I�ve washed the floor-don�t walk in, and the continuous focuses on the duration of the action (often long) e.g. I didn�t have time to call, because I�ve been cleaning the floor all morning. So in many cases both tenses are correct, but it depends what the speaker wants to highlight.
 
 love Nurja
 
 |  27 Jan 2009     
					
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 Mariethe House
 
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							| thank you so much! that sounds pretty easy to remember! 
 good night!
 
 mariethe
 
 |  27 Jan 2009     
					
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