■4、 a portion, a series of, a kind of, the number of等与名词 构成名词短语作主语时应看作单数,谓语动词用单数 例如: A series of high technology products has been laid out in the exhibition.一系列高科技产品已在展览上展出 The number of printing mistakes in some recent books often surprises people even to death 近来一些书籍里印刷错误的数量让人吃惊得要命 A substantial portion of the reports is missing这些报告都 没有提及实质问题。 a kind of rose in the garden smells very pleasant这座花园 里有一种玫瑰香气怡人。◼ 4、a portion, a series of, a kind of, the number of等与名词 构成名词短语作主语时应看作单数，谓语动词用单数。 ◼ 例如： ◼ A series of high technology products has been laid out in the exhibition. 一系列高科技产品已在展览上展出。 ◼ The number of printing mistakes in some recent books often surprises people even to death. 近来一些书籍里印刷错误的数量让人吃惊得要命。 ◼ A substantial portion of the reports is missing .这些报告都 没有提及实质问题。 ◼ A kind of rose in the garden smells very pleasant.这座花园 里有一种玫瑰香气怡人