Three times three makes nine.
三乘三等于九。
Ten thousand pounds is a large sum.
一万英镑是一大笔钱。
★算术中的动词，近年来单复数都通用。
Two hours is enough.
二小时足够了。
2 one
谓语动词一般用单数形式（但either，neither 在口语中可接复数谓语动词）
of 之后的复数名词不是主语而是介词of 的宾语，of 前面的one，every one……等才是主语。
Neither of them is right.
=Neither is right.
两个中没有一个是对的。
Either of them is right.
=Either is right.
两个之中有一个是对的。
Each of them (Each boy)has a book.
=They each have a book.
他们每个人（每一个男孩）有一本书。（强调个体）
3 none of……
none of+不可数名词 谓语动词用单数形式
none of+可数名词 为语动词可用单复数两种形式。
★none of……谓语动语用单数形式比较规范，用复数形式比较口语化。
=None of the boys here like dancing.
这儿的男孩子们都不喜欢跳舞。
4 分数或百分数+of+词组
分数或百分数+of+词组作主语时，谓语动词的数取决于of 后的名词
或代词的数。
分数或百分数+of+词组（不可数名词或是单数）→谓语动词用单数
形式。
分数或百分数+of+词组（复语名词）→谓语动词用复数形式。
Three-fourths of the surface of the earth is sea.(88)
地球表面四分之三是海洋。
Two-thirds of the people present are against the plan.
出席人数的三分之二反对这项计划。
Tens of tons of waste goes into the air with the smoke
everyday.
每天成百吨的废气随着烟雾混到空气中去。
5 more than……
more than one（单数名词）+单数动词
more than two（复数名词）+复数动词
More than one boy has been there.
不止一个男孩已经去过那儿了。
More than two boys have been there.
已经有两个以上的男孩去过那儿了。
6 number of……
A number of the students are for the plan.
一些学生（同意）赞成这一计划。
许多学生昨天缺席。
计算机课上学生的数目限制为十人。
7 ten+形容词
the+形容词，表示一类人→谓语动词用复数
the+形容词，表示一类物→谓语动词用单数
The rich (=Rich people)are for the decision but the
poor(=poor people)are against it.
富人们支持这项决议而穷人们反对它。
The beauty is hers.
这些漂亮的东西是她的。
The learned(=The learned people)are apt to despise the
ignorant.(△△)
有学识的人往往轻视无知识的人。
8 every,any,some,no 构成的复合词
Everyone has his own hobby.
每个人都有他自己的嗜好。
Listen, someone is singing.
听，有人在唱歌。
Anyone but you is welcome.
除了你任何人都受欢迎。