主语

主语是句子陈述的对象，说明是谁或什么，表示什么人或什么事；是执行动作和行为的主体。

主语的形式包括名词，代词，数词，动名词，动词不定式和从句等。

名词作主语

Our school is not far from my house.

代词作主语

We like our school very much.

数词作主语

Two plus two is four.

动名词作主语

Learning English well is very important.

动词不定式作主语

To see is to believe.

句子作主语

What I mean is to work harder.

谓语

谓语陈述主语的动作或状态，指出做什么，是什么，怎么样，一般位于主语之后，体现时态和语态。

复合谓语包括两类：情态动词或助动词+主要动词，连系动词+表语。

I won't do it again.

You’d better catch a bus.

You look the same.

The weather gets warmer，and the days get longer.

宾语

宾语是动作和行为的对象，是承受的主体，可位于及物动词，介词，形容词(worth，careful)之后。

宾语分为两类直接宾语和间接宾语，直接宾语一般是物，间接宾语一般是人。

I like music.

We all like him.

Give me five.

I like swimming.

I like to go fishing.

The book is worth reading.

I think he is right.

My parents bought me a computer.