謂語

謂語(predicate verb)是對主語動作或狀態的陳述或說明，指出“做什么”、“是什么”或“怎么樣”。謂語動詞的位置一般在主語之后。

謂語由動詞充當，說明主語所作的動作或具有的特征和狀態。依據其在句中繁簡程度可把謂語分為簡單謂語和復合謂語兩類。不論何種時態、語態、語氣，凡由一個動詞(或動詞詞組)構成的謂語都是簡單謂語。

簡單謂語：

由動詞、動詞短語或者動詞的時態構成。如：

I like walking. (一般現在時主動語態)

I made your birthday cake last night. (一般過去時主動語態)

It is used by travellers and business people all over the world. (一般現在時被動語態)

復合謂語：

1.由情態動詞或助動詞+不帶to的動詞不定式構成。如：

You may keep the book for two weeks.

He has caught a bad cold.

My sister is crying over there.

I have been waiting for you all the time.

I would stay at home all day.

2.由系動詞加表語構成。系動詞不能單獨作謂語，要和表語一起作謂語。

We are students.

Your idea sounds great.