15.4 謂語需用單數(shù)
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1) 代詞each和由every, some, no, any等構(gòu)成的復(fù)合代詞作主語,或主語中含有each, every, 謂語需用單數(shù)。
  Each of us has a tape-recorder.
  There is something wrong with my watch.

2) 當主語是一本書或一條格言時,謂語動詞常用單數(shù)。
  The Arabian Night is a book known to lovers of English.
  <天方夜譚>>是英語愛好者熟悉的一本好書。

3) 表示金錢,時間,價格或度量衡的復(fù)合名詞作主語 時,通常把這些名詞看作一個整體,謂語一般用單數(shù)。(用復(fù)數(shù)也可,意思不變。)
  Three weeks was allowed for making the necessary preparations.
  Ten yuan is enough.