主语形式是单数.但意义为复数.谓语动词根据意义要用复数,反之主语形式为复数.但意义为单数.谓语动词也用单数.如表示一笔钱.一段时间.一定重量时.这些单位虽是复数形式.但谓语动词是单数形式. 例如:It seems to me that five years is so short a time. Two hundred dollars was spent on the books. 有些集体名词.如family, group, class等作主语时.作为整体看待.谓语动词要用单数.就其中一个个成员而言.谓语要用复数. 例如:My family is a happy one. My family are watching TV. 【查看更多】