肯定句：主语 be 其它。 如：He is a worker. 他是工人。

否定句：主语 be not 其它。 He is not a worker.他不是工人。

一般疑问句：Be 主语 其它。

如：I am a student.

-Are you a student?

-Yes. I am. / No, I m not.

特殊疑问句：疑问词 一般疑问句。

如：My bike is under the tree.

Is your bike under the tree?

Where is your bike?

2.行为动词的变化。

肯定句：主语 动词原形。

否定句：主语 don t 动词原形。

如：I like bread.

I don t like bread.

当主语为第三人称单数时，要用doesn t构成否定句。

如：He ofter plays football.

He doesn t often play football.

一般疑问句：Do 主语 动词原形 其它。

如：I often play football.

- Do you often play football?

- Yes, I do. / No, I don t.

当主语为第三人称单数时，要用does构成一般疑问句。

如：She goes to school by bike.

- Does she go to school by bike?

- Yes, she does. / No, she doesn t.

特殊疑问句：疑问词 一般疑问句。

如：She goes to school by bike.

Does she go to school by bike?

How does she go to school?

动词 s的变化规则

1.一般情况下，直接加-s，如：cook-cooks, milk-milks

2.以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes

3.以 辅音字母 y 结尾，变y为i, 再加-es，如：study-studies