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，谓语动词常用单数。如：My luggage was sent by airThe equipment of our factory is all imported from Britain4）不定式、现在分词和从句作主语，谓语动词通常用单数：Playing with fire is dangerous注意：若用 and 连接两个动名词、不定式短语或主语从句，表示两个不同的概念，则谓语动词用复数形式。若表示同一概念，则谓语动词用单数形式Early to rise and early to bed is a good habiWhen and where the building will be built hasn'. t been decided主语从句要根据从句表达的意思而定What she said is correcWhat he gave me are five English books谓语动词用复数的情况1）由 and 或 both...and.连接两个单数名词作主语时，指的是复数概念，谓 语动词用复数形式（不可数名词同样）。如：Fire and water do not agree注意假如 and 连接的两个词是指同一个人、同一事物或同一概念，则两个 名词共用一个冠词，谓语动词必须用单数。The teacher and writer...
