摘要： population作为整体作主语时.谓语动词用单数形式.如果就其中某部分而言.谓语动词用复数形式.也就是说出现分数.百分数修饰名词.那么谓语动词的单复数形式要根据名词的形式和意义来决定.如Two thirds of the books are about science. 而Two thirds of the book has been finished.

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