be动词有哪些be动词用法详解
Be动词表示“……是……”的意思。现在式（The Present Forms）有am，is，are三种。
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?be动词用法详解am、is用于主语表单数概念的句中（主语是you除外）。?第一人称单数I配合am来用，常见句型“I am+…”；第三人称单数He、She 、It配合is使用，常见句型“She/He/It is +…”如：
?I am ten years old.
?I am a boy.
?She is a good girl.
?He is so thin.
?It is a dog. 它是一只狗。
?Are主要用于主语表复数概念的句中
?Are主要用于主语表复数概念的句中（包括一些简单集体名词，如：people，family），第二人称(You)配合are使用，常见句型：“You are+…”
?如：
?You are great.
?Amy and Mary are sisters.艾米和玛丽是姐妹。
?The family are all at home.全家人都在家。
?There are many apples on the tree. 树上有很多苹果。
?代词you是一个单复数同形词，既可表示“你”，又可表示“你们”，所以避免混淆，总是跟are做朋友。
?常见的be动词短语／词组1.be pleased to do 做……感到愉快
小学英语Be动词、助动词、人称代词主宾格练习 一、选择括号里的词的恰当形式填空。 1、There _________(be)some water in the glass. 2、_______(be)Tom ___________(read) a book now? 3、Please pass_____(we) the ball. 4、When _________ (do) your father usually _________ (go) to work? 5、How old __________ (be)you last year? 6、Which dog ________ (be) yours? /Ten and two ________ (be) twelve. 7、Where ________(be) your friends yesterday? 8、I will give the presents to________(they). 9、Lily is taller than (I)./ Put the desk between (he) and (I). 二、选择填空： 1、My brother ____ a teacher. He ____ his pupils very much. A. is, like B. is, likes C. are, likes D. are, like 2、_____ you go to school by bus? A. Are B. Is C. Do D. Does 3、When _____ your birthday? D. does C. do B. is A. are 4、Which ____ bigger, the sun or the moon? A. are B. is C. be D. / 5、What ______ they _____ on Saturdays?
be动词与助动词的用法 1.陈述句:be动词第一人称用am,第二人称用are,第三人称单数用is复数用are. 助动词do一般省略,直接用动词,注意动词时态和人称变化.有时在动词前加do,表示强调,加强语气.如:Do be quiet! 2.疑问句:be动词直接提前,其他部分不变(由陈述句转变).助动词do同样,由省略直接提前放置,后面动词不变,注意do的时态和人称变化. 3.否定句:be动词和助动词do后面加not. be作助动词用的形式如下： ①am, is, are, was, were ②助动词+be：shall be, will be, can be, etc. ③have/has/had + been（完成时） ④am, is, …being（进行时） （1）表达进行时态 句型be + V-ing…（进行时态） 例：What are you reading? （你正在阅读什么？） I am reading a magazine. （我正在阅读杂志。） 例：He will be taking a walk in the park at this time tomorrow morning. （明天早晨此时他将会正在公园散步。） 例：She has been teaching English in our school for years. （她已在我们学校教英语许多年了。） 解说第一例句是表达现在进行时，第二例句是将来进行时，第三例句是现在完成进行时。（2）表达被动语态 句型be +p.p. …（被动语态） 例：English is spoken in both Canada and the United States. （加拿大和美国都讲英语。）
be动词用法 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（我）时，be动词用am。 如：I am a student.我是一名学生。 I am还可缩写成I'm。如：I'm David.我是大卫。 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：Are you twelve?你是十二岁吗？ Tom and Lily are good friends.汤姆和莉莉是好朋友。 They are at school. 他们在学校。 These are books. 这些是书。 We are students . 我们是学生。 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. 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。 She is my friend.她是我的朋友。
It is a dog. 它是一只狗。 This is a bike .这是一辆自行车。 That is a cup . 那是一个杯子。 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。 [解题过程] 根据以上叙述我们可以把动词的用法以口诀的形式表述出来： 我（I）是am, 你（you）是are, 剩下is留给她（she）,他（he）,它（it）, 两个以上都用are。 be动词用法歌 be动词真伟大，生出is, am, are。 我用am，你用are，is连接他，她，它。 单数名词用is，复数名词全用are。 变疑问，往前提，句末问号莫丢弃。 变否定，更容易，be后not莫忘记。 疑问否定任你变，句首大写莫迟疑。 1 用动词be （am，are，is）填空
be 动词、助动词、情态动词讲解（基础篇） 1、 用单数，反之用复数。 ◆ 句中含有be动词时： 肯定句：主语＋be ＋其他 否定句：主语＋be ＋not ＋其他 一般疑问句：Be ＋主语＋其他＋？ 特殊疑问句：疑问词(what / who / when / where)＋be ＋主语＋其 他＋？ I am a teacher. You are right. She is 16 years old. My father is at home. The students are playing games. My teacher was ill yesterday. There is a picture on the wall. There are two books on the table. ★ be 动词用法歌： 我用am，你用are，is 连接他她它。单数名词用is，复数名词全用are。 变疑问，往前提，句末问号莫丢弃；变否定，更容易，be 后not 莫忘记； 疑问否定任你变，句首大写莫迟疑。 ★ be 动词作谓语，它后面一般跟名词、形容词或介词短语。她个子很高。 她在教室里。她是一个高个子的女孩。 2、助动词的用法。 英语句子按正常语序是“什么人或事物” + “做什么”，即，我们常说的“主语+ 谓语+ 其他” 。 ①主语为I 或复数名词、代词时：肯定句：I / We / They / The students
＋动词原形＋其他＋。 We watch TV every night. 变否定：主语＋don't ＋动词原形＋其他＋。 We don't watch TV every night. 一般疑问句Do + 主语+ 动词原形+ 其他+ ？ Do you watch TV every night? Yes, we do. / No, we don 't. 特殊疑问句：疑问词+ do + 主语+ 动词原形+ 其他+ ？ How often do you watch TV? ②主语为单数名词或代词时：肯定句：主语+ 动词第三人称单数形式 + 其他+ 。 He watches TV every night. 否定句：主语+ doesn't+动词原形+其他+。 He doesn't watch TV every night. 一般疑问句：Does + 主语+ 动词原形+ 其他+ ？ Does he watch TV every night? Yes, he does. / No, he doesn 't. 特殊疑问句：疑问词+ does + 主语+ 动词原形+ 其他+ ？ How often does he watch TV? ★主语为单数或不可数名词，谓语要用单数第三人称，反过来，看见动词用了单数第三人称，可以推知主语是单数或不可数名词。 ( )1. How __ ______ your dad help at home? A. do B. does C. is ( )2. ______ goes bad easily in summer. A. Milk B Apples C. Cakes ③过去时的句式（当句子时态为过去时时，动词用过去式，不受主语单复数的影响） 肯定句：主语+ 过去式+ 其他+ 。 He / We got up early every morning last year. 否定句：主语+ didn't + 动词原形+ 其他+ 。 He / We didn't get up early every morning last year. 一般疑问句：Did + 主语+ 动词原形+ 其他+ ？ Did he / you get up early every morning last year? Yes, he
Be动词和助动词用法区别其实be动词也是助动词（auxiliary verbs）。 英语动词大致可分为三种：助动词（auxiliary verbs），情态动词（modal verbs），实意动词（full verbs）。 助动词（auxiliary verbs）：do，be，have。没有实意，“帮助”别的动词，表示时态，否定和提问。情态动词（modal verbs）：can，must，may。也是“帮助”别的动词，但是有自己的实意。实意动词（full verbs）：play，run，think。其他有实意的动词。 be动词可用作助动词（auxiliary verbs）：1，be+Ving：所有的进行时态，如：2，be+过去分词：被动式。 be动词也可用做实意动词（full verbs）：be[bi]v.有；在；是。 你这样想，一个句子里要有动词吧。再看看它们的名字，“be 动词”和“助动词”， 先说“be动词”，（1）这名字里有动词，说明他是动词，句子里有他就不会有别的动词（除非这些动词以别的形式出现，这是后话）了，（2）“am,is,are,was,were”叫be动词，是因为他们是be的不同形式 再说“助动词”，（1）一定要注意“助”，是帮助的意思，说明他不是动词，只是起到了辅助的作用，所以，他们就一定要与动词同时出现。[记住啊，他们离不开动词，但是动词没有他们也是可以的]
（2）did,do,does只是do的不同形式，根据你所需要的时态来选择（1）用于肯定句，否定句和疑问句 am：第一人称单数（即只与I连用），用于现在时（一般现在，现在进行，只要那时态中是现在的就行）eg:①I am a girl.一般现在时②I am eating an apple.现在进行时 ③I am going to do my homework.[be going to表将来，将来中只有这一种] is：第三人称单数，用于现在时（一般现在，现在进行，只要那时态中是现在的就行）(it就不举例了)eg:①She/He is a girl/boy.一般现在时②He/She is eating an apple.现在进行时③He/She is going to do his homework.[be going to表将来，将来中只有这一种] are：第二人称单数，所有人称复数，用于现在时（一般现在，现在进行，只要那时态中是现在的就行）eg:①You are a girl. We/You(你们)/They are girls.一般现在时②You are eating an apple.We/You(你们)/They are eating apples.现在进行时③We/You(你们)/They are going to do our/your/their homework.[be going to表将来，将来中只有这一种] was：第一人称单数，第三人称单数，用于过去时（一般过去，
be动词、助动词、情态动词讲解 (基础篇) 1、be动词的用法。 英语中，be动词选用单数还是复数，要由主语来定，主语是单数，就用单数，反之用复数。 ◆ 句中含有be动词时： 肯定句：主语＋be ＋其他 否定句：主语＋ be ＋ not ＋其他 一般疑问句： Be ＋主语＋其他＋？ 特殊疑问句：疑问词（what / who / when / where）＋ be ＋主语＋其他＋？ I am a teacher. You are right. She is 16 years old. My father is at home. The students are playing games. My teacher was ill yesterday. There is a picture on the wall.
There are two books on the table. ★ be动词用法歌： 我用am，你用are，is 连接他她它。单数名词用is，复数名词全用are。 变疑问，往前提，句末问号莫丢弃；变否定，更容易，be后not莫忘记； 疑问否定任你变，句首大写莫迟疑。 ★ be动词作谓语，它后面一般跟名词、形容词或介词短语。 她个子很高。她在教室里。 她是一个高个子的女孩。 2、助动词的用法。 英语句子按正常语序是“什么人或事物” + “做什么”，即，我们常说的“主语 + 谓语 + 其他”。 ① 主语为I 或复数名词、代词时： 肯定句： I / We / They / The students ＋动词原形＋其他 ＋。 We watch TV every night. 变否定：主语＋don’t ＋动词原形＋其他＋。
七年级英语双休日作业 班级：姓名：等级 英语句型变化总结练习 1、含有be动词am，is，are构成的句子： 变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。 变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: a student? 否定句: He a student. 肯定句：We are from China. 一般疑问句: from China? 否定句：We from China 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can, may,提到句子的前面,句尾用问号即可. 变否定句时直接在can, may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句:she swim? 否定句: She swim. 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 变否定句时在主语后面加don’t / doesn’t , 谓语用动词原形。例如: 肯定句: They play football after school. 一般疑问句: play football after school? 否定句: They football after school. 肯定句：Tom watches TV every day. 一般疑问句: Tom TV every day? 否定句: Tom TV every day.
注意：变否定句时相关词的改变 肯定句变否定句时，除将谓语变为否定式外，句中其他词语也可能随之改变： 如将some改为any，too和also改为either，and改为or等：There are some birds in the tree. 树上有些鸟。 →There aren’t ______ birds in the tree. 树上没有鸟。 He likes the book, too. 他也喜欢这本书。 →He doesn’t like the book, ______. 他也不喜欢这本书。He likes singing and dancing. 他喜欢唱歌和跳舞。 →He doe sn’t like singing ______dancing. 他不喜欢唱歌也 不喜欢跳舞。补充练习： 根据句后括号内的要求，填入句中所缺的词： 1. I know the answer. (一般疑问句) ______ ______ know the answer? 2. We can see some birds. (一般疑问句) ______ ______ see ______ birds? 3. There is a computer in the house. (一般疑问句) ______ ______ a computer in the house? 4. There are some flowers on the teachers’ desk. (一般疑问句) ______ ______ any flowers on the teachers’ desk? 5. There are some apples on the tree. (否定式) There ______ ______ ______ apples on the tree. 6. I think he is old. (否定句) I ______ think he ______ old.
be动词、一般动词和助动词 一、be动词、一般动词的现在式 （1）be动词的现在式—am/are/is a.是（表状态） We are happy.—我们很高兴 b.在（表存在） She is in America.—她在美国 含be动词（am/are/is）的肯定句变成否定句时，在be动词后加not即可。 肯定句：主语+am/are/is… 否定句：主语+am/are/is+not… He is a good baseball player. 他是一个好棒球员 （否定句）He is not a good baseball player. = He’s not a good baseball player. = He isn’t a good baseball player. 含be动词（am/are/is）的肯定句变成疑问句时，将be动词拿到主语前，句尾加？即可。肯定句：主语+am/are/is… 疑问句：Am/Are/Is+主语…？ 1.That is his camera. 那是他的相机 （疑问句）Is that his camera?
2.The girl is a junior high school student. 那女孩是初中生 （疑问句）Is the girl a junior high school student? 动词开头的疑问句为一般疑问句，可用yes或no回答，而答句中的主语 （问句）Am/Are/Is+主语…？ （答句）Yes,主语+am/are/is No,主语+am/are/is not 1.Is that man your math teacher? Yes, he is./No,he is not. 2.Are you eating your lunch? Yes, I am./No, I’m not. （2）一般动词的现在式 凡是日常生活中具体的动作，如：eat-吃饭，walk-走路及抽象的动作如：like-喜欢，think-思考…皆为一般动词 a.大部分动词加s works/plays b.一般动词词尾为o/s/sh/ch时。加es go-goes/wash-washes/watch-watches c.一般动词词尾为字音+y时，去y加ies cry-cries/study-studies have和has has为have（有，吃）的单数形式 They have a lot of money.
小学英语讲义be动词的用法及简写 简缩形式的变法 一。在肯定句中一般把首字母换成' I am=I'm he is=he's they are=they're she is=she's we are=we're it is=it's Let us= Let's That is=that's what is= what's who is=who's where is=where's 注：Ｉwould =I'd(would里只留一个ｄ) I will=I'll(will中留两个ll) 月份都是保留前三个字母当然第一个字母要大写 This is 注：没有缩写 二否定句的简写， not中的o换成'就好了否定句一般加not,只要把 't = is not isn aren't = are not t = can not can'
be动词的用法：二， are。（不是我不是你不是复数）你用are, is用在他她它，复数全用我用am, 动词提前到句首然后后面加？变成一般疑问句把benot 三把肯定句变成否 定句直接在be动词后加相应练习 are 填空is用、am 、 Yeah, she______ a student. 1、 I ______ Jenny. He______ Peter. 、2 How old ______you? I'm ten.、 3 _______ this a cat? 4、 You _____ my friend. 、5 What _____ this ? It's a cat. 6、6 / 1 课堂小测试 am,is,are填空。一、用1.I ________ Kitty. She _______ a student. friends. 2.Jane and Tom _________my My sisters _______tall. 3._______ there a table in the room? 4.There _____ some glasses on it. 5.There ________many monkeys in the zoo. 二、写出下列完全形式的简缩形式。 I am=_____ he is= _____ they are=_____ she is=_____ we are=_____ What is =_____ let us=_____ is not=_____ are not=_____ It is=_____ 课后练习 一、写出下列完全形式的简缩形式。 we are=_____ what is=_____ they are=_____ he is=_____ let us=_____ are not=_____ 1、my father_____ a doctor.我父亲不是一名医生。 2、_____ your name？你叫什么名字？ 3、_____ a girl.我是一名女孩。 4、they_____brother.他们不是兄弟。 二、用am,is,are填空。 I ___ She ___ They ___ We ___He You ___Here ___ these That Those 1.There_________ a beautiful rainbow in the sky.
1、be动词的用法。 be am / is are 现在时 was were 过去时 单数复数 英语中，be动词选用单数还是复数，要由主语来定，主语是单数，就用单数，反之用复数。 ◆句中含有be动词时： 肯定句：主语＋be ＋其他 否定句：主语＋ be ＋ not ＋其他 一般疑问句： Be ＋主语＋其他＋？ 特殊疑问句：疑问词（what / who / when / where）＋ be ＋主语＋其他＋？ I am a teacher. You are right. She is 16 years old. My father is at home. The students are playing games. My teacher was ill yesterday. There is a picture on the wall. There are two books on the table. ★ be动词用法歌： 我用am，你用are，is 连接他她它。单数名词用is，复数名词全用are。 变疑问，往前提，句末问号莫丢弃；变否定，更容易，be后not莫忘记； 疑问否定任你变，句首大写莫迟疑。 ★ be动词作谓语，它后面一般跟名词、形容词或介词短语。 2、助动词的用法。 英语句子按正常语序是“什么人或事物” + “做什么”，即，我们常说的“主语 + 谓语 + 其他”。 ①主语为I 或复数名词、代词时： 肯定句： I / We / They / The students ＋动词原形＋其他＋。 We watch TV every night. 变否定：主语＋don’t ＋动词原形＋其他＋。 We don’t watch TV every night. 一般疑问句 Do + 主语 + 动词原形 + 其他 + ？ Do you watch TV every night? Yes, we do. / No, we don’t. 特殊疑问句：疑问词 + do + 主语 + 动词原形 + 其他 + ？ How often do you watch TV? ②主语为单数名词或代词时： 肯定句：主语 + 动词第三人称单数形式 + 其他 + 。 He watches TV every night. 否定句：主语+ doesn’t+动词原形+其他+。
be动词的用法 be动词用法歌： 我用am/你用are, is连接他，她，它。单数名词用is,复数名词全用are. 变疑问，往前提，句末问号莫丢弃。变否定，更容易，be后not莫忘记。疑问否定任你变，句首大写莫迟疑。 一.用 1.1 am, is, are 填空 a student. 10. Ten and two twelve ? 2. You a doctor. 11.1 at school. 3. It a car. at school. 4. They cars ?13. We stude nts. 5. 1 from Australia?14. They from China? 6. She a student?15.These buses? 7. That my red skirt?16. Those oranges. jeans on the desk?17. The girl Jack's sister. a scarf for you?The dog tall and fat. 19. she from Jinan 2& What class you in 20. you American 29. How your father 21. your mother in China? 30. Whose dress this 22. your friends in New York 31. Whose socks they 23. your brother in the classroo 32. Where your friends m 33. Which dog yours 24. Who 1 34. How old you last year 25. What her name 35. Where your mother She 26.Where _______ her mother __ at home. 27.How old ______ your teacher? 二.用适当形式填空。 1.The man with big eyes _____________ (be not) a teacher. 2.The black gloves ___ ____ __ (be not) for Su Yang? 3.This pair of gloves ___________ (be not) for Yang Ling. 4.Jane and Tom _______ _ (be not) my friends? 5.My parents ______________ __ (be not) very busy every day. 6.Mike and Liu Tao ______________ (be not) at school. 7.Here _____ _ (be not) some sweaters for you? 8.Yang Ling _______________ (be not) eleven years old. 三?句型转换。 Eg. That is a book. 否定句：That is not a book. 疑问句:Is that a book 回答: Yes, it is. / No, it isn't.
1.be动词（am/is/are） 主语be动词（原形）be动词（过去式） I am was He/she/it is was We/you/they are were 口诀：我用am, 你用are，is用在他她它，所有复数全用are ①肯定和否定句 I am (not) from London. He is(not) a teacher. She is(not) in the dining room. My hair is(not) long. Her eyes are(not) small. ②一般疑问句 Am I a Chinese?——Yes, you are. /No, you aren’t. Is the cat fat? ——Yes, it is. /No, it isn’t. Are they American?——Yes, they are. /No, they aren’t. 表示疑问，一般回答只有两种可能Yes或No，句中没有疑问词。 如何将一个肯定的陈述句改为否定句： 1、看句中有无be动词，如有，把be动词提到句首即可。 2、看句中有无情态动词，如有，把情态动词提到句首即可。 3、如上述二者都没有，就应把助动提到句首。分四个步骤： （1）肯定陈述句中本来是没有助动词的，要加上去，位置在主语（某人/某物）后，动词前。 （2）确定助动词用do、does还是did，根据句中动词，动词是原形的助动词就用do，动词是第三人称单数的助动词就用does，动词用过去式的助动词就有did。
（3）把助动词后提到句首。 （4）原句中动词假如发生变化就要恢复成原形。 有some的要考虑是否要用any 2.助动词（do/does/did） 主语助动词（原形）助动词（过去式）否定形式I/We/you/they do did don’t/didn’t He/she/it does did doesn’t/didn’t ①.Do+非第三人称单数＋动词原形…? do/don't you/they have...?—Yes, I do/No, I don’t. ②.Does+第三人称单数＋动词原形…? does/doesn't he/she have...?—Yes, he does./No, he doesn’t. ③Did+所有主格＋动词原形…? did/didn't you/he/she/they go to school?—Yes, i did./No, I didn’t. 3.特殊疑问句 表示疑问，有疑问词开头，回答有很多种可能。常用疑问词：What、Who、When、Which、Why、Whose、How ※What do you/they/we…+动词原形？I/They/We+动词原形… What does he/she/it…He/She/It +(动词＋S)…. What did you/they/we/ he/she/it…I/They/We/ He/She/It +动词过去式Eg:What did you do last weekend? I cleaned my room. Who cleaned my room? Your mother cleaned your room. When do you go to school? I go to school at 7 o’clock. Which one is your book? The red one is my book. Why do you like this book? Because it is funny.
苏打水1. 由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: Is he a student? 否定句: He is not a student. 反问句: He is a student, isn't he? He isn't a student, is he? 画线提问: 对he提问: Who is a student? 对a student 提问: What is he? or What does he do? 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句: Can she swim? 否定句: She can not swim. 反问句: She can swim, can't she? She can not swim, can she? 画线提问: 对she提问: Who can swim? 对swim提问: What can she do? 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 例如: 肯定句: They play football after school. 一般疑问句: Do they play football after school? 否定句: They don't (do not) play football after school. 反问句: They play football after school, don't they? They don't play football after school, do they? 画线提问: 对they提问: Who play football after school?
1.1Be 动词的三种形式(am, is, are) （一般现在时态中） I am in guangzhou now. My father (He) in Shanghai. My sister (She) is in Wuhan. Guangzhou (it) a city. We (Lucy and I ) students. You are a teacher. They(Guangzhou and Wuhan) cities. 练习：用am, is, are 填空。 1．The U.S._______ a big country. 2．Guangzhou _______ one of the largest province in China. 3．Guangzhou and Shanghai _______ morden cities. 4．We _______ in Guangzhou now. 5．I _______ a student in XX school. 6．Lucy and I _______ teenagers. 7．David _______ my classmate. 8．You _______ my best friend. 9．My dog _______ my best friend. 10．My mother and sister _______ at home. 1.2Be 动词位置。 主语 Be 补语 I am from China. China is a country. China is big. Chinese is my native language. You are from Guangzhou. It is hot in Wuhan. 1主语放在句首。作主语的为：人或物。从主语看出我们在谈论的是谁或什么。 2 Be动词am, is, are 放在主语的后面。
英语中be动词用法和助动词---do 1. 由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: Is he a student? 否定句: He is not a student. 反问句: He is a student, isn't he? He isn't a student, is he? 画线提问: 对he提问: Who is a student? 对a student 提问: What is he? or What does he do? 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句: Can she swim? 否定句: She can not swim. 反问句: She can swim, can't she? She can not swim, can she? 画线提问: 对she提问: Who can swim? 对swim提问: What can she do? 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 例如: 肯定句: They play football after school. 一般疑问句: Do they play football after school? 否定句: They don't (do not) play football after school. 反问句: They play football after school, don't they?
be动词 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。根据句子中不同的人称、数和时间，型态，应该选择相应的be动词。 要看语句的时态: 如果是一般过去时,就用was/were 如果是一般现在时,就用am/is/are 如果是一般将来时,就用will be 然后看主语的人称及复数形式: 一般过去时: 第一人称和第三人称的单数形式，则用was 第一人称和第二人称、第三人称的复数，则用were 一般现在时: 第一人称单数形式，用am 第三人称单数形式，用is 第一人称复数、第二人称、第三人称的复数形式，则用are 一般将来时:will be 口诀: 一般时态有关be动词的口诀: 我用am，你用are，is连着他她它，单数主语用is，复数主语全用are。 用法 he is, we are, you are, they are (缩略式I'm, you're, he's, we're, you're, they're), (否定缩略式I'm not, isn't, aren't), 过去时I was, you were, he was, we were, you were, they were (过去时否定缩略式wasn't, weren't),过去分词been,现在分词being 英语的"be"是个特殊动词;有些语言，如马来文等，并没有"be"这样的动词。"Be"除了原形的"be"之外，还有另外七种形式:am, is, are, been, being, was, were. 在句子中，"be"可以是主动词(The Principal Verb)或助动词(The Auxiliary Verb)
1. 由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: Is he a student? 否定句: He is not a student. 反问句: He is a student, isn't he? He isn't a student, is he? 画线提问: 对he提问: Who is a student? 对a student 提问: What is he? or What does he do? 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句: Can she swim? 否定句: She can not swim. 反问句: She can swim, can't she? She can not swim, can she? 画线提问: 对she提问: Who can swim? 对swim提问: What can she do? 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 例如: 肯定句: They play football after school. 一般疑问句: Do they play football after school? 否定句: They don't (do not) play football after school. 反问句: They play football after school, don't they? They don't play football after school, do they? 画线提问: 对they提问: Who play football after school?