Question

主谓一致详细讲解

Answer 1

主谓一致主要针对一般现在时态：（人称做主语）
1.Be动词
I am student我 是学生
he/she is student 他/她 是学生
We/you/they are students. 我们/你（们/）他们 是学生
2.助动词
I do/have/
She/he does/has
We
/they/you/ do/have
3.行为动词(以eat为例)
I eat
She/he eats
You/they eat

总结：对于一般现在时态，第一人称和第二人称的谓语动词用复数，第三人称用单数。对于Be动词，复数是are，单数是is,（am只针对I 除外）；对于助动词，单数是does/has，复数是do/have；对于行为动词，复数是动词原形，单数是原动词的单数第三人称形式（加s或者es...）

现在完成时
She/he has done
I have done
They/you/we have done

总结：对于现在完成时态，只有助动词have的变化，has/have done共同组成复合谓语。主语是she/he/用has，其他情况用have

对于非人称作主语的句子也有很多，这里就要判断主语是单数还是复数，试比较如下例子：
The girl is outgoing.
The girls are outgoing.

Everyone knows the answer.
All of them know the answer.
Nobody knows the answer.

The book is written by Mrs Green.
The books are written by Mrs Green.

Do I/you/they/we win the prize?
Does he win the prize?

Have you/they/ received the letters?
Has she received the letter?

其他情况的主谓一致：
【There be句型】
There are three boys in the beach.
There is one girl in the beach.
There is one girl and three boys in the beach.
There are three boys and one girl in the beach.

最后两个例子是就近原则，也就是跟be动词挨得近的那个是复数，谓语动词就用复数，反之亦然。

【动名词做主语用单数】
Playing sports is good for your body.