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小学四种时态句子结构以及各种时态标志词一般现在时的句型结构一般现在时的标志词：sometimes, often, usually, always, every day,five days a week, three times a month等.1.含有be动词的句子结构的变化：①肯定句：主语+be(am,is,are)+其他。
如：I am a boy. 我是一个男孩。
②否定句：主语+ be + not +其他。
如：He is not a worker.他不是工人。
③一般疑问句：Be +主语+其它？如：-Are you a student? -Yes. I am. / No, I'm not.④特殊疑问句：疑问词+一般疑问句？如：Where is my bike?2.含有行为动词的句子结构的变化：①肯定句：主语+行为动词(+其它)。
如：We study English.我们学习英语。
②否定句：主语+ don't( doesn't ) +动词原形(+其它)。
如：I don't like bread. He doesn't often play.③一般疑问句：Do( Does ) +主语+动词原形+其他？如：-Do you often play football? - Yes, I do. / No, I don't. -Does she go to work by bike? - Yes, she does. / No, she doesn't.④特殊疑问句：疑问词+一般疑问句？即：疑问词+ Do( Does ) +主语+动词原形+其他？如：How does your father go to work?一般过去时标志词：yesterday, last, the day before …, ago和过去的某个时间，具体如下：（1）yesterday, yesterday morning/afternoon/evening , last week, last year, at the end of last term/week/mo nth/year等,（2）一段时间+ago如:ten years ago, five hours ago,（3）过去的某个时间，如： on January 1st,2004, in the 1980s等.1.含有be动词的句子结构的变化：⑴am 和is在一般过去时中变为was。
重点语法含有be动词的句型转换肯定句变否定句一、肯定句变否定句的基本原则在转换肯定句变否定句时，我们需要根据句子的结构和语法规律来进行相应的调整。
以下是一些常见的句型转换规则：1.句子结构为主语 + be动词 + 表语肯定句：主语 + be动词 + 表语否定句：主语 + be动词的否定形式（比如is not, am not, are not）+ 表语肯定句：She is a doctor.否定句：She is not a doctor.2.句子结构为主语 + be动词 + 表语 + 其他成分肯定句：主语 + be动词 + 表语 + 其他成分否定句：主语 + be动词的否定形式 + 表语 + 其他成分肯定句：They are studying English in the library.否定句：They are not studying English in the library.3.句子结构为主语 + be动词 + 其他成分肯定句：主语 + be动词 + 其他成分否定句：主语 + be动词的否定形式 + 其他成分肯定句：He is sleeping right now.否定句：He is not sleeping right now.二、特殊情况下的句型转换规则除了上述基本原则外，还有一些特殊情况需要特别注意。
1.当be动词为am时，否定形式为am not，而不是is not或are not。
肯定句：I am happy.否定句：I am not happy.2.当be动词为is时，否定形式为is not，而不是am not或are not。
肯定句：It is a beautiful day.否定句：It is not a beautiful day.3.当be动词为are时，否定形式为are not，而不是am not或is not。
肯定句：We are good friends.否定句：We are not good friends.通过上述规则和例子，我们可以清楚地了解如何将重点语法含有be动词的肯定句转换成否定句。
句型变换以及be 动词的用法Be 动词用法口诀 :I amYou areis 连着他 , 她 , 它 ( he is, she is, it is)单数一律用is复数一律都用areBe动词一般疑问句一般疑问句 :将 am, is, are 提到句首第一个字母大写 ,句号变问号I 用 am, you 用 are,is 连着他 (he) 她 (she) 它 (it).单数名词用is, my 复数名词全用are.father （ he ）、yourYou and I(we)sister（ she ）Lucy（ Lucy and liangliang ）（ they ）变否认 ,很简单 ,not 加 be 在后边 .变疑问 ,也不难 ,只须把 be 放前 .否认疑问任你变，注意大小写和标点。
例：I am---are youmy----yourbe 动词用法练习题（ 1）1.选择正确的 be 动词填空。
（1）I _____ a student.（2）We _____ friends.（3）He _____ a good boy.（4）She ______ is my sister.（5）They _____ playing football.（6）You ______my friend. 2.此刻进行时练习：1）I ______ a boy. ______ you a boy? No, I _____ not.2）The girl______ Jack's sister.3）______ your brother in the classroom?4）Who ______ I?6）My sister's name ______Nancy.8）There ______ some apples on the tree.5） The jeans ______ on the desk. 7）There ______ a girl in the room.9）There _______ a boy, two girls, three men and ten women in the park.3.句型变换：1.I am a teacher.( 变换成为一般疑问句并回答)____________________________________________________2.They are reading a book. .( 变换成为一般疑问句并回答)3.He is playing computer games. ( 变换成为一般疑问句并回答) ________________________________________________________________________________________________________4.We are having an English class.( 变换成为一般疑问句并回答)_________________________________________________________________________________________________________5.She is dancing. ( 变换成为一般疑问句并回答)____________________________________________________be 动词用法练习题（ 2）1.选择正确的 be 动词填空。
小学四种时态句子结构以及各种时态标志词一般现在时的句型结构一般现在时的标志词：sometimes, often, usually, always, every day, five days a week, three times a month等.1. 含有be动词的句子结构的变化：①肯定句：主语+be(am,is,are)+其他。
如：I am a boy. 我是一个男孩。
②否定句：主语+ be + not +其他。
如：He is not a worker.他不是工人。
③一般疑问句：Be +主语+其它？如：-Are you a student? -Yes. I am. / No, I'm not.④特殊疑问句：疑问词+一般疑问句？如：Where is my bike?2. 含有行为动词的句子结构的变化：①肯定句：主语+行为动词(+其它)。
如：We study English.我们学习英语。
②否定句：主语+ don't( doesn't ) +动词原形(+其它)。
如：I don't like bread. He doesn't often play.③一般疑问句：Do( Does ) +主语+动词原形+其他？ 如：-Do you often play football? - Yes, I do. / No, I don't. -Does she go to work by bike? - Yes, she does. / No, she doesn't.④特殊疑问句：疑问词+一般疑问句？即：疑问词+ Do( Does ) +主语+动词原形+其他？ 如：How does your father go to work?一般过去时句型结构一般过去时标志词：yesterday, last, the daybefore …, ago和过去的某个时间，具体如下：（1）yesterday,yesterday morning/afternoon/evening ,last week, last year, at the end of last term/we 等,（2）一段时间+ago如:ten years ago, five hours ago,（3）过去的某个时间，如： on January 1st,2004, in the 1980s等.1.含有be动词的句子结构的变化：⑴am 和is在一般过去时中变为was。
Be动词句型转换笔记一Be动词：在英语语法中，be动词意思和用法很多，一般的意思是：是，此种用法，有多种变化形式，is，am，are，was，were，being，been，to be.另外，be动词还有成为的意思。
二例句：1.肯定句：I am a boy.否定句：I am not a boy.变法：Be动词后加not2.肯定句：She is my teacher.否定句：She is not my teacher.三练习：1.Tom is my little brother.中文：否定句：中文：2.They are her schoolmates.中文：否定句：中文：3.Lingling is a student.中文：中文：4.He is a policeman.中文：否定句：中文：四例句：1.肯定句：They are Tom’s family.一般疑问句：Are they Tom’s family?变法：Be动词提到句首，第一，二人称转换，其他不变。
2．肯定句：My mother is a teacher.一般疑问句：Is your mother a teacher?五练习：1.She is in Class one Grade four.中文：否定句：中文：一般疑问句：中文：2.Mr.liu is a good doctor.中文:中文：一般疑问句：中文：3．My best friend is Lucy. 中文：否定句;中文:一般疑问句:中文：4.I am a postman.中文：否定句：中文：一般疑问句：中文：5.You are a boy.中文:否定句:中文：一般疑问句：中文：。
前言一.实意动词与BE动词(以一般时为例)英语当中的第一类动词,实意动词,即由实际意思的动词,如run, say, stay,go,want,第二类动词为BE动词,除了表示“是”的时候有实际意思以外,其他情况都没意思。
一个句子里面如果没有实意动词,就必须加BE动词,单数不可数都加is, 复数加are, I接am,you 和are(was是am,is的过去式, were是are的过去式). 如:1.where do you come from(come为实意动词)= where are you from (are 此处没意思)2.I come from CQ(come 为实意动词)=I am from CQ (am此处没意思)3.you look fat(look为实意动词)= you are fat.(are 此处没意思)4.I am a teacher (am此处有实际意思,表示“是”)5.Is this your umbrella? (is 此处有实际意思,表示“是”)注意:一般情况下,如果有了实意动词就不需要be动词了,而且BE动词绝对不能跟动词原形一起使用。
二.句型变化(以一般时为例)肯定句变为否定句,一般疑问句,特殊疑问句,最重要的也是要找到是否有以下的单词,be 动词,助动词(can、will、would、shall、could、may、might、must)(助动词后必须接动词原形,详见前言第四点助动词介绍),和在完成式当中的have、has(had很少用).1.如果是be动词a)变否定:直接be后加noti.I am a teacher——I’m not a teacherb)变一般疑问句:直接把be动词提前i.She is my uncle——Is she my unclec)变特殊疑问句:先找到特殊疑问词放在句首,再把be动词提前。
疑问词一般情况下是what,how,when,who,which,where,why,但也有很多情况的疑问词是这样的,如: what color, what kind of…,what make…,how old(问年龄),howlong(问时间,长短),how far(问距离),how often(问频率),which one, which people等。
Be动词讲解及练习Be 动词的用法：一、Be动词包括：am ,is , are口诀：我用am, 你用are, is用在他她它，复数全用are。
1、肯定和否定句：否定句：在Be动词后加notI am (not) from Canada.He is(not) a student.She is(not) in the reading room.My nose is(not) big.His eyes are(not) small.2、一般疑问句：把Be动词提到句首I am Chinese. Am I Chinese?Yes, you are. No, you aren’t.They are teachers. Are they teachers?Yes, they are. No, they aren’t. The cat is mine. Is the cat yours?Yes, it is. No, it isn’t.二、Be动词在一般过去时中的变化：am--was is --was are--were1、am 和is在一般过去时中变为was。
（was not=wasn’t）2、are在一般过去时中变为were。
（were not=weren’t）3、带有was或were的句子，其否定、疑问的变化和is, am, are一样，即否定句在was或were后加not，一般疑问句把was或were调到句首。
三、there be 句型中be动词的用法1、在there be 句型中，be 动词根据最靠近be 动词的那个名词决定，主语是单数或不可数名词，be 动词用is；主语是复数，be 动词用are。
2、there be 句型的否定句在be 动词后加not，一般疑问句把be 动词调到句首。
用恰当的be动词填空。
1. I ______ a student. ______ you a teacher? No, I _____ not.2. The boy______ Tom's brother.3. The horse _______ tall and fat.4. The man with big eyes _______ a teacher.5. ______ your brother in the classroom?6. Where _____ your mother? She ______ at home.7. How _______ your father?8. Mike and Liu Tao ______ at school.9. Whose dress ______ this?10. Whose socks ______ they?11. That ______ my red skirt.12. Who ______ I?13.The pants ______ on the desk.14. Here ______ a shirt for you.15. Here ______ the white shoes for you.16. The black gloves ______ for Jack.17. This pair of gloves ______ for Mr Black.18. The two cups of milk _____ for me.19. Some tea ______ in the glass.20. Li Lei’s shirt _______ over there.21. My sister's name ______Nancy.22. This ______ not Wang Fang's pencil.23. ______ David and Helen from England?24. There ______ a girl in the room.25. There ______ some apples on the tree.26. _______ there any kites in the classroom?27. _______ there any apple juice in the bottle?28. There _______ some bread on the plate.29. There _______ a boy, two girls, three men and ten women in the park.30. You, he and I ______ from China.。
英语里的be动词，就是am is are.带有be动词的句型，be动词在里面的主要意思就是“是”他的句型转换比较简单。
肯定句变疑问句：be动词直接提前，首字母大写，句末变问号。
否定句：be动词后面加not肯定回答：Yes, 主语+be否定回答：No, 主语+be+not肯定句：He is a boy. You are boys.疑问句：Is he a boy? Are you boys?肯定回答：Yes, he is. Yes, we are.否定回答：No, he is not. No, we are not.=isn’t. = aren’t.否定句：He is not a boy. You are not boys.=isn’t =aren’t英语中的实意动词句子，实意动词就是有实际动作的动词，比如jump run see eat like have 等。
碰到实意动词的句子，他们句子里面没有be动词am, is,are, 那么他的句型转换就不够用了，这个时候，他就需要助动词（帮助动词的词---do, does.）肯定句变疑问句，开头统统用do或者does，其他照抄，动词用原型，句末变问号。
肯定句变否定句，在动词前面加上do not（don’t）或者does not(doesn’t)就可以。
肯定回答：Yes. 主语+助动词.否定回答：No, 主语+助动词+not.肯定句：He likes apples. They run with dogs. I like eating apples.疑问句：Does he like apples? Do they run with dogs? Do you like eating apples?肯定回答：Yes, he does. Yes, they do. Yes, I do.否定回答：No, he does not. No, they do not. No, I do not.=doesn’t. =don’t don’t否定句：He doesn’t like apples. They don’t run with dogs. I don’t like eating apples.另外碰到主语是I和we的肯定句，改疑问句时要把I 和we改成you。
be动词变一般疑问句练习
我(I)用am 你(you)用are is连着他(he)她(she)它(it)
我们(we)你们(you)他们(they)要用are
单数名词用is 复数形式要用are
变否定真容易be后not为标记变问句be提前，句尾问号要配全（？）
一、把下列句子变为一般疑问句并作肯定回答。
1. I a new student. __________________________________________
2.Dale my friend. __________________________________________
3. My name Frank. __________________________________________
4.His name Eric. __________________________________________
5. Her name Cindy. __________________________________________
6. He and I friends. __________________________________________
7. Grace and Helen e sisters. ___________________________________
8.That boy Mike. __________________________________________
9.That girl Mary. __________________________________________
10. This is my school. __________________________________________
二、把下列句子变为一般疑问。
1.This is her bag.
__________________________________________
2.That is his mother.
________________________________________
3.These are my books.
______________________________________
4. Those are his friends.
_____________________________________
5.We are new students. _____________________________________
6.That cat is black.
__________________________________________
7.Jack is my brother.
__________________________________________
8. This is our teacher.
__________________________________________
9.That is my father.
__________________________________________
应用时多注意缩写形式要牢记：
=I am =you are =he is
=she is =it is =we are
=you are =they are
练习一：
1. Mr. Cow likes to eat grass. He ______ very strong.
2. I _____ fat. I ______ tall.
3. Who _______ your sister? Jenny __________.
4. ______ you Mr. Birdie? Yes, I ______.
5. How ________ Linda’s Spotty? He’s fine.
6. My pet ____ a smart monkey.
7. How many people ______ there in your family?
8. ______ you in the classroom? Yes, I ________.
9. Who _______ this man in the photo? It _____ your father.
10. Bob and Lily ______ my classmates.
练习二：
1.How many dogs ______ there in the box?
2.There ______one. 2. The picture ______ beautiful.
3. 3. What _____ this? It ______ a blue pen.
4. _________Sandy in the classroom? Yes, he ______.
5. I ______ hungry. You ____ thirty.
6. He ______sad. She ______ sleepy.
7. What shape _____it? It ______ a circle.
8. The birds _______ on the tree.
9. These presents _______ for me. I _______ so happy.
10. My parents _______ teachers. They _____ busy.
练习三：
1. _______ it a new photo? Yes, it _____.
2. This ______ an apple. That ______ an orange.
3. These dolls ______ beautiful.
4. The girl ______ my sister. Her name ______ Kitty.
5. Your eyes ______ big.
6. What colour ______ the flowers? They ______ red and white.
7. My father _____ a worker. He ______ thirty-eight years old. He ______ tall.
8. ______ you farmers? Yes, we ________.
9. _______ your mother at home? Yes, she ________.
10. Sandy _______ playing games with his friends. They _____ happy.
把下列句子改成否定句和一般疑问句
1.This is the reading room.
一般疑问句：____________________________
肯定回答：_________________ 否定回答：_____________
2. She’s Miss Smith. 一般疑问句：____________________________
肯定回答：_________________ 否定回答：_____________
3.I am in Grade 3.
一般疑问句：_________________________
肯定回答：________________ 否定回答：_______________________ 4.Miss Zhang is our English teacher.
一般疑问句：___________________________
肯定回答：________________ 否定回答：______________________ 5. We are teachers.
一般疑问句：____________________________
肯定回答：______________ 否定回答：______________
6.These are apples.
一般疑问句：____________________________
肯定回答：_______________否定回答：______________
7.We are in the classroom.
一般疑问句：____________________________
肯定回答：________________否定回答：______________
8.Tom and Tim are good friends.
一般疑问句：____________________________
肯定回答：________________否定回答：_______________
9. Tom is under the tree.
一般疑问句：____________________________
肯定回答：________________ 否定回答：______________
10. She is a good student.
一般疑问句：____________________________
肯定回答：________________ 否定回答：________________。
