谓语动词单复数形式

在英文句子中，谓语的写法应该与主语的数保持一致。当主语在意义上为复数时，谓语动词必须采用相应的复数形式。当主语在意义上为单数时， 谓语动词须采用相应的单数形式。

1) 谓语动词的复数形式一般使用动词的原形来表示。 另外，be(助)动词复数形式在一般现在时和现在进行时中写为are, 在过去时态写为were。

These books belong to me. 这些书是我的。
They are absolute beginners. 他们完全是生手。
The workers are pushing for higher wages. 这些工人在争取增加工资。
The streets were filled with people. 街上到处都是人。
These roses have beautiful blooms.这些玫瑰花开得真美。
These facilities have benefited the whole town. 这些设施使全城受益。

2) 谓语动词的单数形式的写法规则如下:
a. 通常在动词词尾加s, 如: work -- works create -- creates
b. 动词如果以ch, sh, s, x 或 o 结尾时，需加es, 如: teach -- teaches fix -- fixes
c. 动词以辅音加 y 结尾时, 先变 y 为 i, 再加 es, 如: cry -- cries reply -- replies
d. be(助)动词单数形式在一般现在时和现在进行时中写为 is, 在过去时态写为 was。
e. (助)动词have 的单数形式写为 has。
f. 当主语为 I 时, be 动词单数形式写为 am （过去时用was）。

She works hard from morning to night. 她从早到晚辛勤工作。
He teaches modern Chinese literature in the university. 他在大学教现代中国文学。
When the curtain rises, Juliet is writing at her desk. 幕启时，朱丽叶在办公桌旁写东西。
He is a genius. 他是个天才。
The water is boiling. 水正开着呢。
He was only three years old when his mother died. 他母亲去逝时他才三岁。
The river was threatening to overflow its banks. 河水大有决堤之势。
The notice was put above the door. 布告贴在门的上方。
She has three kids. 她有三个小孩。
He has cheated me. 他骗了我。
I am afraid of him. 我很怕他。
Hearing that news, I was really sad. 听到那个消息后，我真的很伤心。

3) 当谓语动词前有助动词时，则单复数形式应体现在助动词上。
Some boys don't like to bath regularly. 有些男孩不喜欢经常洗澡。
She doesn't eat much breakfast. 她早点吃得不多。

Peter has been there before. 彼得以前去过那里。
They have been there before. 他们以前去过那里。

He is working on the report. 他正在做报告。
They are working on the project. 他们正在做报告。