英语简单句的结构

简单句通常由主语和谓语两个部分构成。主语通常由名词词组充当，谓语由动词词组充当。句子=主语+谓语（名词词组+动词词组）

名词词组是以名词为中心词的词组，由限定词+名词中心词构成，可加其他修饰语。

These intelligent girl students in my class, who you know very well, all speak English very fluently.

除名词外，代词、数词以及某些非限定动词和名词性分句都可起名词词组的作用。

He is our monitor.

Three from seven leaves four.

Reading makes a full man.

To study one foreign language is not enough.

What caused the accident is still investigated.

某些形容词，特别是形容人 和表示国籍的形容词，一旦与定冠词搭配便可充当名词词组。

The poor are in need of food.

The chinese are a great people.

动词词组是以动词为中心词的词组。动词中心词的性质决定着动词词组的构成。

Mary is a typist.（连系动词+主语补语）

The baby cried.（不及物动词）

He rang the bell.（单宾及物动词+宾语）

He bought me a skirt.（双宾及物动词+间接宾语+直接宾语）

They elected him president.(复杂及物动词+宾语+宾语补语）

We live in Beijing.(不及物动词+状语)

She puts the pillow in the cradle. (及物动词+宾语+状语)

动词词组中心词叫做谓语动词。谓语动词又分为简单形式和复杂形式。简单谓语动词仅由一个主动词构成，而复杂谓语动词由一个或一个以上的助动词+主动词构成。

He might have left here.

It may rain.

I will be flying to Hong kong.

She has been living here for 20 years.