可數(shù)名詞與不可數(shù)名詞的相互轉化

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可數(shù)名詞與不可數(shù)名詞在一定條件下可以轉化。很多表示蔬菜、動物等的名詞,一般來說是可數(shù)的,但是表示餐桌上的食品時,就轉換為不可數(shù)名詞。
    【例如】There are some chickens in the yard.(院子里有幾只雞。)Would you like chicken or fish?(你喜歡吃雞,還是吃魚?)
    物質名詞或抽象名詞一般是不可數(shù)的,但用來表示若干類和數(shù)量之多時,可轉化為可數(shù)名詞,但往往意義有所變化,如:water(水)→waters(水域),sea(海)→seas(海域)
    【再如】
    Beer is a kind of nice drink in hot summer.
    I had two beers and a big bowl of beef.
    當抽象名詞表示“某一種”或“某一方面”的抽象概念時,其前可加a/an.【例如】
    What he did showed a certain honesty which made me admire him.