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教学课件
北师大英语七年级上册
Starter Section 2 & Section 3语法专项
Be 动词
全解精讲+分层练习
学习目标
1.掌握be动词（am/is/are）的正确搭配规则，适配不同人称和数
2.熟练运用肯定句、否定句的基本结构及缩写形式
3.掌握一般疑问句的构成、问答逻辑，能精准回应
4.区分this/that/these/those作主语时的问答技巧
5.能通过多样练习巩固语法，提升基础句式应用能力
核心语法框架梳理
本单元聚焦英语基础句式，核心围绕be动词展开
三大核心内容：肯定句（陈述事实）、否定句（否定事实）、一般疑问句（Yes/No问答）
be动词是连接主语和表语的关键，需根据主语灵活匹配
语法难度适中，是英语句式学习的入门基础，务必扎实掌握
后续复杂句式均以此为基础，需重点理解结构逻辑
be动词-核心概念与功能
be动词是英语中最基础的连系动词，无实际词义
核心功能：连接主语和表语，说明主语的身份、状态或特征
表语可是名词、形容词、介词短语等，补充主语信息
例：He is a student.（is连接主语he和表语a student，说明身份）
例：They are happy.（are连接主语they和表语happy，说明状态）
be动词有三种形式：am、is、are，需随主语变化
be动词-人称与数的搭配表
主语类型 对应的be动词 例句
I（第一人称单数） am I am a middle school student.
He/She/It/单数名词/this/that is She is my sister. / This is a pen.
We/You/They/复数名词/these/those are We are friends. / Those are books.
记忆口诀：I用am，you用are，is连着他她它，单数is复数are 肯定句-结构与用法
肯定句是最基础的陈述句，用于表达客观事实或状态
基本结构：主语 + be动词 + 表语
例1：My name is Lily.（表语为名词，说明身份）
例2：The classroom is clean.（表语为形容词，说明特征）
例3：They are in the park.（表语为介词短语，说明位置）
注意：主语为单数时be动词用is，复数用are，I用am
肯定句-缩写形式详解
完整形式 缩写形式 例句
I am I'm I'm from Beijing.
He is He's He's a doctor.
She is She's She's very kind.
It is It's It's a sunny day.
We are We're We're in Class 2.
You are You're You're a good student.
They are They're They're my classmates.
缩写规则：主语和be动词之间加撇号，省略be动词中的部分字母 否定句-结构与用法
否定句用于否定事实或状态，在be动词后加not即可
基本结构：主语 + be动词 + not + 表语
例1：I am not late.（否定“我迟到”这一状态）
例2：He is not a teacher.（否定“他是老师”这一身份）
例3：They are not in the classroom.（否定“他们在教室”这一位置）
否定句可分为完整形式和缩写形式，日常交流中缩写更常用
否定句-缩写形式对照表
完整形式 缩写形式 适用主语类型
am not I'm not I（无其他缩写形式）
is not isn't He/She/It/单数名词等
are not aren't We/You/They/复数名词等
例：She is not happy. = She isn't happy. 例：We are not busy. = We aren't busy. 注意：am not的缩写只有I'm not，无其他形式 肯定句与否定句-转换练习
1.I am a student. → ____________________
2.He is from the UK. → ____________________
3.They are in the park. → ____________________
4.This is an interesting book. → ____________________
5.We are happy. → ____________________
I am not a student. / I'm not a student.
He is not from the UK. / He isn't from the UK.
They are not in the park. /
They aren't in the park.
This is not an interesting book. / This isn't an interesting book.
We are not happy. / We aren't happy.
一般疑问句-核心概念
一般疑问句用于询问“是”或“否”，需用Yes或No回答
基本结构：Be动词 + 主语 + 表语 + ？
构成规则：将肯定句中的be动词提到主语前，句末加问号
例：肯定句：He is a student. → 一般疑问句：Is he a student
例：肯定句：They are in Class 1. → 一般疑问句：Are they in Class 1
回答需遵循“前后一致”原则，肯定用Yes，否定用No
一般疑问句-问答对应表
一般疑问句结构 肯定回答 否定回答
Am I ... Yes, I am. No, I'm not.
Is he/she/it/单数名词... Yes, he/she/it is. No, he/she/it isn't.
Are we/you/they/复数名词... Yes, we/you/they are. No, we/you/they aren't.
注意：回答时主语需用相应的人称代词，避免重复原主语 例：Is Lily your friend → Yes, she is.（不用Yes, Lily is.） 一般疑问句-特殊指代技巧
疑问句（主语为指示代词） 肯定回答 否定回答
Is this/that ... Yes, it is. No, it isn't.
Are these/those ... Yes, they are. No, they aren't.
例1：Is this a pen → Yes, it is. / No, it isn't. 例2：Are those your books → Yes, they are. / No, they aren't. 替代规则：单数指示代词用it，复数指示代词用they 当主语是this/that/these/those时，回答需用it/they替代
一般疑问句-标点与语调
书写时，句末必须加问号（？），不可用句号
朗读时，语调需上扬，体现疑问语气
例：Are you from Shanghai （语调上扬）
若疑问句由this/that/these/those引导，指代具体事物时，语调同样上扬
注意：回答时语调需平缓，肯定回答和否定回答语调一致
一般疑问句-转换练习
1.I am fine. → 疑问句：____________________
肯定回答：________________ 否定回答：________________
2.She is a teacher. → 疑问句：____________________
肯定回答：________________ 否定回答：________________
3.They are in the classroom. → 疑问句：____________________
肯定回答：________________ 否定回答：________________
Are you fine
Yes, I am.
No, I'm not.
Is she a teacher
Yes, she is.
No, she isn't.
Are they in the classroom
Yes, they are.
No, they aren't.
语法易错点提醒（一）
1.be动词搭配错误：混淆不同主语对应的be动词，如He are...（错误）
2.否定句缩写错误：将is not缩写为is not't（正确为isn't）
3.一般疑问句语序错误：主语放在be动词前，如He is a student （错误）
4.回答时主语重复：Is Tom here → Yes, Tom is.（正确为Yes, he is.）
牢记搭配规则和转换逻辑，避免基础错误
语法易错点提醒（二）
1.this/that回答未替代：Is this your bag → Yes, this is.（正确为Yes, it is.）
2.am not缩写错误：I am not a student. → I amn't...（正确为I'm not...）
3.表语词性混淆：误将副词作表语，如They are quickly.（正确为They are quick.）
4.复数主语用is：The books is new.（正确为The books are new.）
基础练习（一）-be动词填空
1.My brother ___________ a student.
2.___________ you from Guangzhou
3.This ___________ a beautiful flower.
4.We ___________ not in the same class.
5.I ___________ very happy today.
6.Those ___________ my father's books.
7.She ___________ a doctor.
8.It ___________ a rainy day.
9.They ___________ good at playing football.
10.Your name ___________ Lucy, right
is
Are
is
are
am
are
is
is
are
is
基础练习（二）-肯定句改否定句
1.He is a good swimmer.
2.We are in the park.
3.This is my English book.
4.I am late for school.
5.They are happy today.
6.She is from Canada.
7.It is a boring movie.
8.Those are my pencils.
He isn't a good swimmer.
We aren't in the park.
This isn't my English book.
I'm not late for school.
They aren't happy today.
She isn't from Canada.
It isn't a boring movie.
Those aren't my pencils.
基础练习（三）-肯定句改一般疑问句
1.She is a nurse.
疑问句：____________________ 回答：Yes, ___________.
2.We are classmates.
疑问句：____________________ 回答：No, ___________.
3.This is a red pen.
疑问句：____________________ 回答：Yes, ___________.
4.I am a middle school student.
疑问句：____________________________ 回答：No, ___________.
Is she a nurse
she is
Are you classmates
we aren’t
it is
Is this a red pen
Are you a middle school student
I’m not
提升练习（一）-单项选择
1.—___________ you a student —Yes, I am.
A. Am B. Is C. Are
2.My mother ___________ a teacher. She works in a school.
A. am B. is C. are
3.—Is that your bag —No, ___________ isn't.
A. it B. that C. this
4.We ___________ not in the same class, but we are good friends.
A. am B. is C. are
C
B
A
C
5.—___________ is your sister —She is fine.
A. How B. What C. Where
6.Those ___________ my books. They are on the desk.
A. am B. is C. are
7.—Are you from the USA —No, I ___________.
A. am B. am not C. isn't
8.He ___________ a student. He is a doctor.
A. is B. isn't C. are
A
C
B
B
提升练习（二）-单项选择
9.This ___________ a dog. Its name is Wangwang.
A. am B. is C. are
10.—Is she your mother —Yes, ___________ is.
A. she B. he C. it
11.I ___________ from China. I live in Beijing.
A. am B. is C. are
12.They ___________ happy because they won the game.
A. am B. is C. are
B
A
A
C
13.—Are these your pencils —No, ___________ aren't.
A. it B. they C. these
14.The book ___________ interesting. I like it very much.
A. am B. is C. are
15.—___________ is that —It's a cat.
A. What B. How C. Where
B
B
A
提升练习（三）-句型转换
1.He is a student.（改为否定句）
2.They are in the classroom.（改为一般疑问句并作否定回答）
3.This is my pencil.（改为一般疑问句并作肯定回答）
4.I am from Shanghai.（改为否定句）
5.She is happy today.（改为一般疑问句并作否定回答）
He isn't a student.
Are they in the classroom No, they aren't.
Is this your pencil Yes, it is.
I'm not from Shanghai.
Is she happy today No, she isn't.
综合练习（一）-补全对话
A: Hello! What's your name
B: My name ___________ Tom.
A: ___________ you from England
B: No, I ___________. I'm from America.
A: ___________ this your pen
B: Yes, it ___________.
A: Are you in Class 3
B: Yes, we ___________. It's a good class.
is
Are
am not
Is
is
are
综合练习（二）-补全对话
A: Good morning! How ___________ you
B: I ___________ fine, thank you. And you
A: I'm OK. ___________ that girl your sister
B: No, she ___________. She is my classmate.
A: ___________ her name
B: Her name ___________ Lily.
A: Are you good friends
B: Yes, we ___________.
are
am
Is
isn’t
What's
is
are
综合练习（三）-判断正误，正（T）误（F）
My name is Amy. I am a student. I'm from Canada. I'm 12 years old. My best friend is Lily. She is from the UK. We are in Class 4. Our classroom is big and clean. Lily is not tall, but she is very kind. We are happy every day.
1.Amy is from the UK. ( )
2.Amy and Lily are classmates. ( )
3.Their classroom is small. ( )
4.Lily is tall and kind. ( )
5.Amy is 12 years old. ( )
F
T
F
F
T
语法知识总结（一）-be动词与句式
be动词三形式：am（I专用）、is（单数主语）、are（复数/you）
肯定句结构：主语 + be动词 + 表语（名词/形容词/介词短语）
否定句结构：主语 + be动词 + not + 表语（可缩写isn't/aren't）
一般疑问句结构：Be动词 + 主语 + 表语 + ？（Yes/No回答）
核心逻辑：be动词随主语变化，句式转换围绕be动词调整
语法知识总结（二）-关键技巧与易错点
问答技巧：this/that用it替代，these/those用they替代
缩写技巧：I'm、He's、She's、It's、We're、You're、They're
易错点：am not无其他缩写；否定回答不可漏not；主语与be动词匹配
记忆口诀：be动词三兄弟，am/is/are；我用am，你用are，单数is复数are；
否定not加后面，疑问be动词放前面
教学课件
Starter Section 2 & Section 3语法专项
Be 动词
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