小升初语法 句型转换专题(一)-句型种类&陈述句变否定句+典型例题（共32张PPT）

(共32张PPT)
句型转换专项讲解
小升初专题讲解课件
主讲教师：Cici
B
D
A
C
英语中的句型种类
陈述句变否定句
陈述句变一般疑问句
对划线部分进行提问
学习内容
Part 1
英语中的句型种类
英语中的句型种类
肯定句
一般疑问句
句型
陈述句
疑问句
否定句
特殊疑问句
I am a student.
I am not a student.
Are you a student
Who are you
陈述句类型
陈述句类型
含有be动词或情态动词
含有实义动词
be动词复习
be动词有三个： am, is, are
我（I）用am,你(you)用are,
is用于“他她它 (he,she,it)”
单数is , 复数are，不可数名词用：is
be动词的过去式：am,is → was are → were
be : am /are /is
I am
= I’m
You are
= We’re
= You’re
We are
He is
=She’s
=It’s
=He’s
She is
It is
[我用am, 你用are,
is跟着他她它，
单数is，复数are.]
be动词和人称代词的缩写形式
I am
You are
He is
She is
It is
We are
You are
They are
I’m
You’re
He’s
She’s
It’s
We’re
You’re
They’re
am
is
are
my brothers
Sally
a cat
I
Peter
you
policemen
情态动词复习
情态动词（Modal verbs）的含义：
情态动词是一种表示语气的单词，用来丰富说话人对这一动作或状态的看法和情感。不能单独做谓语，总是用在动词原形之前。
情态动词有can (could), may (might), must, have to, shall (should), will (would), need (needed),等
情态动词复习
口诀：
情态动词要记牢，动词原型来跟梢，
不分人称和数量， 不同情感要看好。
Can表能力和许可，也许、可能may来，
表一定必须must，should应该来报道。
否定变化也不难，情态后把not添。
疑问变化往前跑，Must回答要记好。
特殊用法：must…
Must I do my homework now (做否定回答)
________________________
No, you needn’t.
实义动词复习
动词（verbs）的含义：
一般就是用来表示动作或状态的词。
5
6
1
2
3
4
动词
look
read
jump
eat
play
drink
Part 2
陈述句变否定句
陈述句变否定句
1.句中含有be动词或情态动词
be动词或情态动词后加
some→any
步骤
一加
二改
and→or
not
too→either
情态动词，be 动词+not的缩写形式
am not
→ am not(没有缩写形式)
is not
→ isn’t
are not
→ aren’t
be动词
was not
→ wasn’t
were not
→ weren’t
过去时态
情态动词，be 动词+not的缩写形式
can not
→ can’t
must not
→mustn’t
should not
→ shouldn’t
情态动词
could not
→ couldn’t
will not
→ won’t
找：找be动词am/is/are/was/were
1
加：在be动词后面加not
2
Be句型变否定句
I was at home last night.
I was not at home last night.
改：some→ any
too→ either and→ or
3
2.There are some apples.（变为否定句）
典型例题
There are apples.
句中有be动词，只需在be动词后+not
not
This apples.
aren’t
any
some变为any
any
1.This is his pen.（变为否定句）
典型例题
This is his pen.
句中有be动词，只需在be动词后+not
not
This his pen.
isn’t
找：找情态动词
1
加：在情态动词后面加not
2
情态动词句型变否定句
I can run fast.
I can not run fast.
改：some→ any
too→ either and→ or
3
I can swim.
典型例题
I can swim.
句中有情态动词，只需在情态动词后+not
not
I swim.
can’t
1.I’m a student.
2.The students of Class 5 are cleaning the classroom.
3.Your father can ride a bike.
4.They can play football after school.
小练笔：将下列句子变为否定句
I’m not a student.
The students of Class 5 aren’t cleaning the classroom.
Your father can’t ride a bike.
They can’t play football after school.
陈述句变否定句
2.句中含有实义动词
借助助动词
some→any
步骤
一借
三改
and→or
don’t/doesn’t/didn’t
too→either
二还
句子中的动词变原型
当主语为第一人称或复数，借助don’t
当主语为第三人称单数，借助doesn’t
当句子时态为过去时态，所有人称都借助didn’t
有借有还，可以助动词看做照妖镜，可以把动词照出原型。
动词三单形式复习
第三人称：he, she, it
单个的人名，地名，国家名
可数名词单数
三单形式
单个不可数名词
(两个不可数名词构成一个整体事物：如：黄油面包the bread and butter)
实义动词变三单形式的变化规则：
1.通常加s：like-likes cook-cooks play-plays
2.以s,x,ch,sh结尾的动词,加es: watch-watches
wash-washes
变化规则
3.以辅音字母加y结尾的动词,去y加ies
4.特殊情况：have-has go-goes do-does
1. We often ______(play) on the playground at weekends.
2. He _________( get) up at six every day.
3. My father_________ (brush) teeth twice a day.
4. The bread ______(look) nice.
5.Danny __________(study) English, Chinese, math and art at school.
6.Mike sometimes ______(go) to the park with his sister.
小练笔：用所给动词的适当形式填空
play
gets
brushes
looks
studies
goes
1.Tom likes apples.（变为否定句）
典型例题
Tom apples.
主语为第三人称单数，要借助doesn’t
does
Tom apples.
doesn’t
not
like
like
借助了doesn’t，动词要变原型。
1.He likes flying kites and singing English songs.
He doesn’t like flying kites and singing English songs.
2.He likes reading stories.
He doesn’t like reading stories.
3.We have some dogs. We don’t have any dogs.
小练笔：将下列句子变为否定句
方法总结
有情用情，有be用be;
无情无be找求助，
助动一出现，动词变原形。
典型例题：改为改为否定句
1. He likes playing football.
_____________________
2. She goes to school by bus.
________________________
He doesn’t like playing football.
She doesn’t go to school by bus.
3. I can cook meals.
__________________________
4. He is a teacher.
__________________________
I can’t cook meals.
He isn’t a teacher？