1. And连接的两个或多个单数名词作主语时,谓语动词用复数形式
His opinion and mine are different他的观点和我的是不同的
如果and连接的是指一个单一概念时,谓语动词用单数
Bread and milk has been my breakfast for years. 牛奶面包多年来一直是我的早餐
2.如果主语是一个抽象概念
如:Swimming jogging and cycling are all goad farms of sports exercises.游泳、慢跑和骑自行车都是很好的运动形式
以what,who,why,haw, whether等wh一词引起的从句做主语时,谓语动词通常用单数;由and连接的两个主句如果指两件事,动词用复数
例如:What he is doing is not clear yet他在干什么还不清楚
3.集体名词family,class,crew(全体船员或机组人员),crowd, group, committee, audience, government, public, team, staff, population等做主语时
例如: My family is a big one.我家人多
4.不定代词either,neither,ever y,each,one,the other, another以及所有的复合不定代词作主语时,谓语动词只用单数,包括“every/each/no……and every/each/no……”作主语时
如:Every/Each plane and every/each pilot is ready to take off. 每架飞机和每个飞行员都已准备好起飞
5. what,who,which,any,mare,some,half,mast,all,none.等代词可以是单数,也可以是复数。但指不可数名词时作单数看待
6.表示时间、重量、长度、价值等的单位名词,如果作整体看待,动词都用单数形式。如果看作组成该数量的一个一个的个体,则动词用复数
如:Twenty miles is a long way to walk. 走二十英里可是很长的一段路
7. “the+形容词”表示一类人时,谓语动词用复数。表示抽象概念或指个别事物时谓语动词用单数
如:The old are well taken care of. 老人得到很好的照顾
8. 如果主语由"a kind/sort/type of this kind/sort/type of +名词”组成,不管名词是单数还是复数,动词通常用单数
如:This kind of man annoys me. =This kind of men annoys me. 这种人让我烦
9. Means作“方法、手段”讲时,单复数同形,其前面有each, every, neither, either,等单数a念的定语时,谓语动词用单数;若有all, both,these等复数概念的定语时谓语动词用复数
“None of the means”作主语时,谓语动词通常用单数
如:There is/are no means of learning what is happening. 没法知道正在发生什么事