一般现在时的讲解及用法

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一般现在时的讲解及用法

一、定义与讲解

1,定义:一般现在时,表示经常性的事情,经常性的动作或一般性事实。

2,只有在第三人称单数用动词的“三单变化”,其他用动词的原形。

注:1第一人称(I,we 第二人称(you第三人称(He,She,they,it,所有的名字名称单数(一个人或事物复数(两个或两个以上的人或事物第三人称单数(第三方的单个的人或事物,除了they

2三单变化

多数在动词(不是名词后+s eg: play — plays like — likes

(1直接在动词词尾加-s.

ask---asks work---works get---gets stay---stays

(2以字母s, x, ch, sh或o结尾的动词,在词尾直接加-es.

watch---watches wish---wishes fix---fixes do---does

go---goes pass---passes

(3以“辅音字母加- y”结尾的动词,要先变y为i再加-es.(辅音字母:除a,e,i,o,u这5个元音字母外的21个字母都是辅音字母;

元音字母加-y:stay--stays play--plays say--says buy--buys

辅音字母加-y:try---tries study---studies cry---cries fly---flies

二、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。 时间状语:every day, sometimes,at…, on Sunday,usually,once a week

I leave home for school at 7 every morning.

2,客观真理,客观存在,科学事实。

The earth goes around the sun.

3,表示格言或警句中。

Practice makes perfect. 熟能生巧。

注意:此用法如果出现在宾语从句中,即使主句是过去时,从句谓语也要用一般现在时。

例:Columbus proved that the earth is round..

4,现在时刻的状态、能力、性格、个性。

Miss wang writes good English but does not speak well.

5,在某些以here,there开头的句子中,用一般现在时表示正在发生的动作。eg.

Here comes a bus .公交车来了

注:与一般现在时连用的时间状语(表示时间的词或词组

(1表示频率的副词:always,often,usually,sometimes.

(2时间状语:on Sundays,every day ,every morning ,every year.

(3表示频率的词组:once a year,three times a week.

动词有三种:实义动词,be动词,情态动词(初一未涉及

5,一般现在时中,当主语是第三人称单数,动词是实义动词 (1动词变相应的第三人称单数形式

(2肯定句主语+动词s+其它

eg.(2011 Bill often gives money to the poor.

(3否定句主语+doesn't+动词原形+其它

eg. Bill often doesn’t give money to the poor.

(4一般疑问句Does+主语+动词原形+其它

eg. Does bill often give money to the poor.

肯定回答Yes,主语+does(Yes,he does

(6否定回答No,主语+doesn't(No,he doesn’t

6,当主语不是第三人称单数时(动词没有三单变化,动词是实义动词(1肯定句主语+动词原形+其它

eg.I want to marry you.

(2否定句主语+don't+动词原形+其它

eg.I don’t want to marry you.

(3一般疑问句Do+主语+动词原形+其它

eg.Do you want to marry me?

肯定回答Yes,主语+do(Yes,I do.

否定回答No,主语+don’t(No,I don’t.

be动词的一般现在时有三种形式,即:am, is, are。 1. 如果主语是第一人称I时,be动词用am。

Eg.肯定句:I am a student. 我是一名学生。

否定句:am not

一般疑问句:Am i

肯定/否定回答:Yes,i am. No i am not.

2. 如果主语是you (你,你们, they (他们,它们,她们或名词复数(两个以上的人或物时,be动词必须用are。

如:肯定句,否定句,一般疑问句及肯定、否定回答

You are my good friend.

Tom and Lily are my good friends.

They are my good friends.

are与主语还可缩写。如:We are= We're,They are =They're, You are = You're。而are与not可缩写成aren't。

如:They aren't students. 他们不是学生。但是am与not不能缩写。

3. 如果主语是单数名词、不可数名词或单数第三人称代词(he, she, it时,be 动词用is。肯定句/否定句/一般疑问句及肯定、否定的回答

如:My mother is a teacher. 我的妈妈是一名老师。

He is a student. 他是一名学生。

is也可与主语缩写,如: He is = He's, My mother is = My mother's等。但是This is

不可缩写。而is与not可缩写成isn't。 如:This isn't a book. 这不是一本书。

三、课堂练习巩固

1,主语为第三人称单数

肯定句:He___gets_____(get up at six o’clock. 否定句:doesn’t ,get 一般疑问句:Does he get up at six o’clock.(肯定,否定回答

2,主语为第一人称

I__get__(getup at six o’clock. 否定句:I don’t get up at six o’clock. 一般疑问句:Do

you get up at six o’clock.(肯定,否定回答

四、课堂强化练习

(一单项选择题

1,The picture _______ nice.

A. looks

B. is looked

C. look

D. is looking

2,She ______ down and soon falls asleep.

A. live

B. lain

C. laid D. sits

3,The teacher ________us to come to school on time.

A. ask

B. asking

C. asks

D. asked

4,John always ______ others.

A. help

B. helping

C. helps

D. to help

5. He ______for eight hours every day.

A. working

B. to work

C. works

D. worked

6. You’d better ______ at home and ______ your homework.

A. to stay, do

B. stay, do C. to stay, to do

D. stay, to do

7. He sits down and ______ a rest.

A. having

B. have

C. to have

D. has

8. Uncle Wang never ______ a cake.

A. make

B. to make

C. making

D. makes

(二句子改错

1. Is your brother speak English?

2. Does he likes going fishing?

3. He likes play games after class.

4. Mr. Wu teachs us English.

5. She don’t do her homework every evening.

五、课后练习 (一用动词的适当形式填空

1. She _________(go to school at seven o’clock.

2. It’s 6 o’clock. They are _________ (eatsupper.

3. He usually ___________ up at 17:00.(get

4. She ___________ (live in Beijing.

5. Amy _________ (be here just now.

6. _______ (bethere a fly on the table just now?

7. My father __________ (watch TV every evening .

8. My father _______________ (make toys these days.

9.________ Amy _________ (read English every day

10. Chen Jie sometimes _________(goto the park with her

sister.

(二选择填空

1.I want____homework now.

A. doing

B. to do

C. to do my

D. do my

2.It's time______.