15.4 謂語(yǔ)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(yǔ),或主語(yǔ)中含有each, every, 謂語(yǔ)需用單數(shù)。
  Each of us has a tape-recorder.
  There is something wrong with my watch.

2) 當(dāng)主語(yǔ)是一本書(shū)或一條格言時(shí),謂語(yǔ)動(dòng)詞常用單數(shù)。
  The Arabian Night is a book known to lovers of English.
  <天方夜譚>>是英語(yǔ)愛(ài)好者熟悉的一本好書(shū)。

3) 表示金錢,時(shí)間,價(jià)格或度量衡的復(fù)合名詞作主語(yǔ) 時(shí),通常把這些名詞看作一個(gè)整體,謂語(yǔ)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.