1．不定代词another，anyone，anybody，anything，each，everyone，everybody，everything，one，someone，somebody，something等作主语时，谓语动词通常用单数。例如：
Anyone who wants to come is welcome．谁愿来都欢迎。
Was there anything about him in the newspaper？报纸中有关于他的消息吗？
Each of these things has a different weight．这些东西的重量是各不相同的。
Everyone has his hobby．各有嗜好。
Everybody is doing his best．各尽所能。
Nobody has time for such things．没有人有时间干这些事。
Someone calls you．有人叫你。
Something is wrong with my watch．我的表出毛病了。
2．表示否定的不定代词no one，nobody，nothing作主语时，谓语动词通常用单数。例如：
No one knows where he is．没人知道他在哪里。
Nobody likes earthquakes．谁也不喜欢地震。
Nothing in the world is difficult for one who sets his mind to do．天下无难事，只怕有心人。
但none作主语时，谓语动词既可用单数，也可用复数。例如：
None have（has）arrived yet．
3．all，most，some等不定代词作主语时，如指的是复数概念，谓语动词用复数，如指的是单数概念，谓语动词用单数。例如：
All are happy to hear the news．大家听到这个消息都很高兴。
All of the bread has been eaten．所有的面包都吃完了。
Most of the earth is covered with water．地球上大部分地区都覆盖着水。
Some of us are ill．我们有些人病了。
4．both，few ，many ，several等用作主语时，谓语动词用复数。例如：
Both of them are bad．他们两人都不好。
Few of them believe that．他们当中没有几个人相信这件事。
Many have come．许多人已经来了。
Several of us think that is wrong．我们当中好几个人都认为那是错的。
5．“more than＋基数词＋复数名词”结构作主语时，谓语用复数；“more than ＋one＋单数名词”结构做主语时，谓语动词用单数。例如：
More than twenty students are playing football on the playground．有二十多个学生在操场上踢球。
There is more than one answer to your question．你的问题不止一个答案。
6．表示数量的不定代词little，much，用作主语时，谓语动词用单数。例如：
Much of our food comes from plants．我们的很多食物都是来自于植物。
There is little to choose between them．他们之间没有什么区别。
7．字母、符号或某个单词作主语时，谓语动词用单数。例如：
A is the first letter of the English alphabet．A是英语字母表中的第一个字母。
“Theirs”is a possessive pronoun．“theirs”是个物主代词。
means D×D．表示D×D。
8．基数词作主语，谓语动词通常用单数。例如：
Fourteen means four and ten．4加10等于14。
Two and four makes six．2加4等于6。
98and 3 is 101．98加3等于101。
但如果基数词表示两个或更多的人或事物时，谓语动词可用复数。例如：
Twelve were absent．十二人缺席。
9．分数（百分数）＋of＋名词作主语时，谓语动词的单复数取决于of后面的名词的数。例如：
Three-fourths of the surface of the earth is sea．地球表面的四分之三是海洋。
Ten percent of the apples are bad．百分之十的苹果是坏的。
10．“数词＋复数名词”作主语，名词表示的是时间、长度、重量、价值时，谓语动词用单数。例如：
Ten years has seemed a long time to me，but a short time to you．十年对于我来说似乎是一段很漫长的时间，而对于你来说，却是很短的。
Five hundred dollars was spent．花了五百美元。
但有时“复数”的意思占主导地位，动词须用复数。例如：
The first ten years are the hardest．开始的十年是最艰苦的。
11．“one or two＋复数名词”作主语，谓语动词用复数。例如：
There are one or two things I want to talk over with you．有一两件事我要同你详谈。
12．动词不定式短语、动名词短语和从句作主语时，谓语动词通常用单数。例如：
How to repair the machine is a difficult question．如何修理这部机器是一个难题。 When they will come hasn't been made public．他们什么时候来还没有公布。
