鲁教版英语七年级上册助动词do does did的用法课件（22张PPT）

助动词do/does/did的用法
I like playing badminton.
Do you like playing it ?
协助主要动词构成谓语的动词叫助动
词，它对谓语动词起辅助作用。被协
助的词叫主要动词。助动词本身没有
含义，不可单独使用。
常见助动词：be, do(does, did), shall, will, have(has)
助动词
Let’s talk about the auxiliary “do /does/did” and the past tense.
Learning Aim
助动词do的基本形式?

do有三种形式：
一、原形
二、一般现在时的第三人称单数形式
三、一般过去时
do的基本用法：
构成否定句
构成一般疑问句及回答
构成特殊疑问句
1.原形
肯定式：do
否定式：do not
缩略式：don’t
用法：do用在第一人称、第二人称和第三人称复数做主语，且时态为一般现在时的句子中。
I/we/you/they/复数名词—动词用原形…
2.现在式第三人称单数
?
用法：does用在第三人称单数做主语，时态为一般现在时的句子中。
he/she/it/名词单数动词用单动……
肯定式 : does
否定式 : does not
缩略否定式：doesn’t
注意：当does出现时，句子中用动词原形
3. 过去式?
肯定式： did
否定式： did not
缩略否定式：didn’t
用法:did用在时态为一般过去时的句子中,用于所有人称。
注意:当did出现时,句子中用动词原形。
For example : I like swimming.
否定句: I like swimming.
don’t
一般疑问句及回答:
like swimming?

Do you
特殊疑问句:
What you like?
d o
Yes , I do./No , I don’t.
For example : He likes swimming.
否定句: He like swimming.
doesn’t
一般疑问句及回答:
he like swimming?
Does
Yes, he does./No, he doesn’t.
特殊疑问句:
What he like?
does
For example : They went to Shanghai.
否定句:They go to Shanghai.
didn’t
一般疑问句及其回答
they go to Shanghai?
Did
Yes, they did./No, they didn’t.
特殊疑问句
Where they go?
did
Let’s have a discussion
含有实义动词的一般现在时句子，进行句子转换时借助于助动词 do/does/did，主语是三单(he/she/it)时用 does，其他用do.过去时句子用did.
否定句在动词原形前加 don’t /doesn’t/didn’t.
一般疑问句把 do/does/did提前.
特殊疑问句由特问词+一般疑问句.

一．用don’t /doesn’t 填空
1.I ________( don’t /doesn’t）play sports.
2.You _________( don’t /doesn’t）like ice-cream.
3.My parents________( don’t /doesn’t） want to watch TV.
don’t
don’t
don’t
练一练

4.His friend _______( don’t /doesn’t）eat breakfast.
5.Mary _______( don’t /doesn’t）like salad.
doesn’t
doesn’t
6.They like bananas. (改为否定句)
They ______ ______ bananas.
7. Tom likes apples. (改为一般疑问句)
______ Tom ______ apples?
8. The students visited this school . (否定句)
The students ______ _______ this school.
don’t like
Does
like
didn’t visit
二.句型转换

Jenny has a ping-pong bat. (变一般疑问句)
_____ Jenny _____a ping-pong bat?
2. I like to eat vegetables every day.(变一般疑问句)
______ you like to eat vegetables every day?
3.The boys played football just now.(变一般疑问句）
_______ the boys play football just now?

Does
Do
have
Did
For example
A:-- Let’s go to see the movie, OK?
B:--Sorry, I don’t want to go out.
----- You can call Tom.
A: --Does he like watching it ?
B:--Maybe.

Make a conversation with your partner ,using do does and did
Group work
Let’s have
the test!
课堂回顾
一、(do )?变句型,先观察,陈述句中动用原,一般疑问do提前,否定don’t实动前。?
二、(does)?若是主语为三单,陈述句中动变形,一般疑问也简单,does放句前,否定doesn’t实动前,动词要还原。
三、（did）用于过去时,一般疑问放句前,否定放实动前,动词要还原。
After class please make a conversation , using do does and did with your group partners.
Next class showing it to us.
Homework
THANK YOU !