英语语法：一般现在时

一般现在时

一、概念。

A.表示事物或人物的特征、状态。

e.g. The sky is blue.I am a student.

B.表示经常性或习惯性的动作。

e.g. I get up at six every day.She likes singing.

C.表示客观现实或规律。

e.g. The earth goes around the sun.

二、标志词

Jack always walks to school.Tony watches TV every night.

Lingling usually studies English in the morning.

频度副词：always, sometimes, usually, often, on Sunday, every day/ week/month.

三、构成

A. be 动词：主语+be(am,is,are)+其它。

e.g. I am a boy.He is a doctor.You are a student.

记忆小tip

我用am，你用are，is 连着他，她，它；单数名词用is，复数名词全用are。

B.行为动词：主语+行为动词(+其它)。

e.g. We study English.Jack walks to school every day.

想一想：

第一个句子和第二个句子的动词形式有什么不一样？为什么会这样呢？

◎当主语为第三人称单数(he, she, it 等)或单数人名时，要在动词后加"-s", "-es", 或“改y 为ies”。

e.g. Mary likes Chinese.Tony watches TV every night.

Lingling studies English every morning.

观察上面三个例句，你能总结出行为动词变成第三人称单数形式的规则吗？

行为动词第三人称单数变化动词规则：

1.一般情况下，直接加-s。

cook-cooks,

milk-milks

2.以s. x. sh. ch. o 结尾，加-es。

guess-guesses, wash-washes, watch-watches, go-goes

3.以“辅音字母+y”结尾，变y 为i, 再

加-es。study-studies carry-

carries

注意特殊变化：have----has do----does go----goes

四、句型

1.be 动词的变化

1）否定句：主语+ be（is, am, are）+ not +其它。

eg：He is not a worker.

2）一般疑问句：Be（is, am, are）+主语+其它。

eg：-Is he a worker?-Yes. he is. / No, he isn’t.

3）特殊疑问句：疑问词+一般疑问句。

eg：What’s he?

2.行为动词的变化

1）否定句：主语+ don't( doesn't ) +动词原形(+其它)。

e.g.I don't like bread.He doesn’t like bread.

当主语为非三单时，要用don’t 构成否定句，后面动词必须用原形。

当主语为三单时，要用doesn't 构成否定句，后面动词必须用原形。

2）一般疑问句：Do(Does ) +主语+动词原形+其它？

e.g. -Do you often play football?

e.g. - Does she go to work by bike?-Y es, I do. / No, I don't.

-Y es, she does. / No, she doesn't.

当主语为非三单时，要用do 构成一般疑问句，后面动词必须用原形。

当主语为三单时，要用does 构成一般疑问句，后面动词必须用原形。

专题训练：一般现在时

一、写出下列动词的第三人称单数。

drink _________ go ________ stay ________ make ________

look _________ have________ pass________ carry ________

come_________ watch_______ sing________ fly __________

study_________ brush________ do________ teach_________

see___________ like_________ guess______ wash_________

二、选择题。

1．They _______ TV in the evening. They do their homework.

A. are watching

B. can’t watching

C. don’t watch

D. don’t watching

2．He said the sun _______ in the east and _______ in the west.

A. rose; set

B. rises; sets

C. rises; set

D. rise; sets