---Doing sports ___ good for our health.
--- Yes, so I do morning _____ every day.


  1. A.
    is, exercise
  2. B.
    is, exercises
  3. C.
    are, exercise
  4. D.
    are, exercises
B
試題分析：句意：做運動對我們的健康有益�！堑�，因此我每天做早操。上文主語Doing sports表達抽象含義，不可數(shù)，故謂語動詞用單數(shù)。Exercise作名詞講時，是可數(shù)名詞。結(jié)合語境可知下文早操表達復(fù)數(shù)含義，故exercise用復(fù)數(shù)形式，選B。
考點：主謂一致及名詞的數(shù)
點評：be動詞往往根據(jù)句子的主語而有所不同，其應(yīng)用原則可以結(jié)合如下歌謠來記憶；我用am，你用are；is用在他、她、它。單數(shù)名詞用is，復(fù)數(shù)名詞全用are。英語中名詞有可數(shù)名詞與不可數(shù)名詞之分，可數(shù)名詞又有單復(fù)數(shù)之分，當(dāng)可數(shù)名詞的數(shù)量不是一個時，要變成復(fù)數(shù)形式，其構(gòu)成規(guī)則也比較復(fù)雜，需要不斷總結(jié)記憶。不可數(shù)名詞大多是一些物質(zhì)名詞和抽象名詞，沒有數(shù)的變化，需要注意的是，一些在漢語中明顯可數(shù)的名詞，在英語中往往不可數(shù)，也需要加以總結(jié)，注意了解中西文化的差別，不能以中式思維思考英語問題。
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