会英语的朋友们帮忙解说一下.谢谢!!!

to buy a book of "english grammar" that will tell you everything you want

推荐薄冰语法，说的比较详细，也比较容易懂，有大量例子。还是看书吧。或者找辅导高考的书，上面也会讲一些基础谁语法。

英语句子成分和英语句子结构讲解及练习

主语（subject） 句子说明的人或事物。

The sun rises in the east. （名词）

He likes dancing. （代词）

Twenty years is a short time in history. (数词)

Seeing is believing. （动名词）

To see is to believe. （不定式）

What he needs is a book. （主语从句）

It is very clear that the elephant is round and tall like a tree. （It形式主语，主语从句是真正主语）

谓语（predicate） 说明主语的动作、状态和特征。

We study English.

He is asleep.

表语（predicative） 系动词之后的成分，表示主语的性质、状态和特征。

He is a teacher. （名词）

Seventy-four! You don’t look it. （代词）

Five and five is ten. （数词）

He is asleep. （形容词）

His father is in. （副词）

The picture is on the wall. ( 介词短语)

My watch is gone missing lost. （形容词化的分词）<