主谓一致

1、非谓语动词作主语表示抽象概念用单数的谓语动词

Planting potatoes needs frequently watering。

Where to go is unknown to us.

2、从句作主语表抽象概念

3、and连接两个单数名词，指同一个概念

There comes the author and writer.

A Knife and folk is useful.

4、every...、and every.... 、each....、and each

no.....、and no....

5、强调句型中不管被强调部分

It is his classmates that helps him.

6、国、人名、书名、杂志、组织机构即使形式是复数

The United Nations is in American.

7、表时间、距离、重量、钱等度量衡名词

8、以s结尾，谓语动词用单数

如politics,maths,physics,economics(经济学）

9、either,neither作主语谓语动词用复数

Nether of us likes swimming.

10、only one of接复数宾语

11、it作形式主语，谓语动词用单数

12、The number of

13、表事物不定代词作主语：something,everything,anything,nothing

Is there everything wrong?

14、减除法中谓语动词用单数

6 minus 4 equal 3.

9 divided by 3 equals 3.

15、car after car车一辆接一辆

16、定冠词 形容词若表一类事物，谓语动词用单数

The new is sure to replace the old.

第二部分谓语动词用复数随后在续。