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 Ann_85
 
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							| Dear colleguaes!   How to explain to students why we say "good behaviour" not using the indefinite article but we use the indefinite article in the phrase "a first-class knowledge", though both knowledge and behaviour are uncountable abstract nouns?    Many thanks beforehand!   |  23 Aug 2016      
					
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 yanogator
 
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							| Ann,  Would you please use "a first-class knowledge" in a sentence? It doesn �t seem right to me, but I can �t quite imagine how you would use it. Thanks, Bruce  |  23 Aug 2016     
					
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 Ann_85
 
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							| Thank you, Bruce for your answer. But I read in a grammar book such a sentence : "She has a first-class knowledge of British law". |  24 Aug 2016     
					
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 yanogator
 
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							| Hey, Alex. This sounds like the kind of thing you would explain well. It seems to me to be just an anomaly of English.   Bruce  |  24 Aug 2016     
					
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 redcamarocruiser
 
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							| I agree with Bruce. Without a context it sounds strange. This site says that there is a list of words that relate to mental processes and feelings which require the indefinite article. So, I guess it is a case by case memorization task, as with so many practices in English.       |  24 Aug 2016     
					
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 Ann_85
 
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							| Many thanks for your help, dear colleagues! I found the links very useful. Once again "Thank you very much"! |  24 Aug 2016     
					
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