系动词的特点

系动词词义不完整，在句中不能单独使用（除省略句外），后面必须接有表语，系动词和表语一起构成合成谓语。

一、系动词的分类：

常见的系动词大致可分为三类。

第一类：表示特征或状态的，有be, look, feel, seem, appear, smell, taste, sound, turn, out（结果是、证明是）等。

You”ll be all right soon.

You don”t look very well.

I feel rather cold.

第二类：表示从一种状态到另一种状态的变化，有become, get, grow, turn, fall, go, come, run等。

He became a world-famous scientist.

It is getting warmer and warmer.

第三类：表示保持状态的，有keep, remain, continue等。

Keep quiet, children!

The weather continued fine for a long time.

It remains to be proved.

系动词后的表语可以是名词、代词、数词、形容词、分词、动名词、不定式、副词、介词短语、词组、从句，系动词be可用于上述所有情况。如：

The pepople are the real heroes.（名词）

That”s something we have always to keep in mind.（代词）

She is often the first to come here.（数词）

She is pretty and wise.（形容词）

The news was surprising.（分词）

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