1、谓语和谓语基本保持单复数的一致，即：主语是可数名词单数或不可数名词时，谓语动词用单数形式：如：
The trousers are very cheap and I want to take them.(裤子很便宜，我想买)
6、a lot of 后跟名词复数时谓语用复数形式，跟不可数名词时谓语用单数形式。如：
A lot of students are playing baseball now.(现在有许多学生在打垒球)
A lot of time was wasted on that work.(大量的时间花在了那个工作上)(被动句)
7、and 连接两个名词做主语时，谓语原则上用复数，但是两个名词若构成一个整体事物时，谓语则用单数。如：
The teacher and his son are picking apples now.(老师和他的儿子在摘苹果)
Fish and chips is very famous food. (鱼和薯条是一种出名的食品)
8、 there be 句型中be的单复数一般由靠近的名词决定。如：
There is a table and four chairs in the room.(房间里有一张桌子和四张椅子)
9、用both…and…连接两个事物做主语时，谓语一般用复数。如：
Both you and I are required to be here tomorrow.(你和我明天要求都来)
10、主语中含有with的短语时，谓语单复数由with之前的人物决定。如：
A woman with a 7-year-old child was standing at the side of the road. (一名妇女带着一个七岁的孩子(当时)就站在路边)
11、either…or…或者 neither…nor…连接两个人物做句子主语时，谓语采用就近原则。如：
Either you or he is right.(要么是你对，要么是他对。/你和他有一个人是对的)
Neither you nor I am going there.(你和我都不打算去那里)
12、表示一段时间或长度概念的复数名词做主语时，谓语一般用单数。如：
Two months is not a short time.(两个月不是个短时间)
Two thousand kilometers is quite a long distance(距离)。(两千千米是相当长的一段距离)
13、主语中含有half of… / three quarters of… / all (of) the …等词语时，谓语的单复数由名词确定，如：
Over three quarters of the information on the Internet is in English.(因特网上四分之三以上的信息是用英语写的)
A third of the students were playing near the lake.(学生的三分之一(当时)正在湖边玩耍)
All of the water in these rivers has been polluted.(这些河流中的水已经被污染了)(被动句)
但是，population一词又有特殊情况：
What's the population of China?(中国人口是多少?)(句子用单数)
Three quarters of the population in this city are Arabs(阿拉伯人)。(这个城市四分之三的人口是阿拉伯人)(句子用复数)
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