1、形式一致主语是复数,谓语动词用复数形式主语是单数,谓语动词用单数形式2、语意一致谓语动词用单数的清况1)当名词词组中心词为表示金钱、时间、度量、距离、价格等复数名词时,把这些复数名词看作一个整体
谓语动词采纳单数形式
Twenty-five dollars is too much to pay for that shirtFifty minutes i'nt enough to finish thissteTen miles seems like a long walk to
me2 以-s”吉尾的书刊名、国名、组织名、游戏名、运动名,谓语动词用单数以-ics 结尾的名词指一门学科时,常用单数谓语动词形式
当这些名词表示实际内容时,谓语动词则用复数形式
这类单词有:economics 经济学 electronic 电子学physics 物理学 politic 政治学mathematics 数学 statistic^ 计学Rootswas a novel about a slave familyHis politics were a matter of great concern to his friendPolitics is his favorite subjectStatistics show that approximately 40 percent of all marriages in the US end indivorce Statistics is a subject that is difficult to learn3)有些表示某类别的总称的集合名词,如: machinery (机械),clothing(衣服),luggage 行李),furniture 家具),equipment (设备),jewelry(珠宝)等作主语时,谓语动词常用