一. 一般现在时行为动词词型变化形式
一般现在时动词只有第三人称有词形变化，其他人称动词均用原形单数第三人称动词变化：
多数在动词后加s play-plays like-likes ,
以s，x，sh，ch，o结尾的动词加es go-goes wash--washes,
以辅音字母加y结尾，把y改i再加es fly-flies study--studies
二. 一般现在时动词be和 have的变化形式
1.动词Be 叫连系动词, 连系动词be的用法：除了第一人称单数用am，和第三人称单数用is以外，其它人称用are。
I am busy. You are busy. He (She) is busy. We (You, They) are busy.
2.动词have的用法：除了第三人称单数用has以外，其它人称一律用have。如:
I have a pen. You have a pen. She (He) has a pen.
We (You, They) have pens.
三. 一般现在时的句型
1.肯定句构成：主语+动词 (注意人称变化) +其它成分
Ihave a dog. We like the little cat. She sings well.
2.否定句构成：
行为动词的否定句：主语+助动词(do/does) + not +动词原形+其它成分
He dosen‘t have a dog. He isn’t young. We don‘t like the little cat.
(借助于助动词do) She doesn’t sing well. (借助于助动词does)
3.一般疑问句：
A.行为动词的一般疑问句：助动词(do/does)+主语+动词原形 + 其它成分
Do you like it? Yes, I do. / No. I don‘t . Does he(she) like it? Yes, he( she )does. / No, he ( she )doesn’t.
B. 动词BE 的一般疑问句Am / Is /Are +主语 + 其它成分
Are you a teacher? Yes, I am. / No, I am not.
Are they students of your school.Yes they are / No they aren,t.
4.特殊疑问句：特殊疑问词 + 一般疑问句
How many students are there in your school?
What do you usually do on Sunday?
四．一般现在时的用法
1.经常性或习惯性的动作，常与表示频度的时间状语连用。如：
every year, sometimes, at 5 o‘clock, on Sunday.
I get up at six o’clock every day.
He gets up at six o‘clock every day.