be动词的用法be动词有三种形式：am, is, are.其中be是原形，am和is是单数，are是复数 am, is, are的用法的用法 am,is,are,在英语中叫在英语中叫be动词。在英语中如何使用它们一般动词。在英语中如何使用它们一般由句子的主语决定。由句子的主语决定。1. I 用用am 如：如：Im a student. 我是一名学生。我是一名学生。2. 三单三单（即除（即除I和和you以外的单数）以外的单数）用用is。如。如he,she,it是三单，是三单，this和和that也是。也是。如：如：He is from Shanghai. 他来自上海。他来自上海。 This is a new book. 这是一本新书。这是一本新书。 Tom is my friend.3. You用用are复数也用复数也用are。如：如：you are 13 years old. We are twelve years old. 我们十二岁。我们十二岁。 How old are you? 你多大了？你多大了？ They are my parents.选择正确的be（is,am,are)动词填空。（1）I _ a student. （2）We _ friends.（3）He _ a good boy. （4）She _ my sister.（5）They _ playing football. （6）You _ my friend.isareisisareare选择正确的be动词填空。1）I _a boy. _you a boy? No, I _ not. 2）The girl_ Kangkangs sister. 3）_ your brother in the classroom? 4）The books _ on the desk.5）My sisters name _Jane.amAreamisIsareis用be动词的适当形式填空。 1. He_a teacher. His name_Li Ying. 2. I_a girl. My name_Wei Hua. 3. He_Liu Hua.4. How old_you? I_ten. 5. What_this? It_a desk. 6. What_its name? Its name_Polly. 7. _you in Class Three? Yes, I _. 8. _Jim a boy? Yes, he _. isisamisisareamisisisisAreamIsis9. _it a cat? Yes, it_. 10. You_a boy. I_a boy, too. 11. Kates father_a worker. 12. Mary and Ann_girl students. 13. Jims sister and I_in Row Three. 14. Lucys mother and father_not at home. Isisareamisareareare含有be动词的句子转换1. 肯定句变否定句，把否定词not直接加在am, is, are的后面。如：I am late today. I am not late today.; He is my good friend. He isnt my good friend.2. 肯定句变一般疑问句，把be提到主语前(be动词是am的往往先变成are再提到句子前），首字母大写，第一人称I或we往往变为第二人称you，句末加问号。如：Daming is in Class Two. Is Daming in Class Two?; We are Americans. Are you Americans? Im a teacher.Are you a teacher?一般疑问句的回答方法。1. Is Daming in Class Two? 肯定回答：Yes, he is. 否定回答：NO, he isnt.2. Are you Americans? 肯定回答： Yes, we are. 否定回答： No,we arent.3. Are you a teacher?肯定回答：肯定回答： Yes, we are.否定回答：否定回答： No,we arent.4. Is your father a teacher? 肯定回答：肯定回答：Yes, he is. 否定回答：否定回答：NO, he isnt.句型转换：将下列句子分别转换成否定句和一般疑问句。（1）I am drawing a picture. 否定句：_ 一般疑问句_（2）They are playing football. 否定句：_ 一般疑问句_（3）His father is a teacher. 否定句：_ 一般疑问句：_（4）We are having a music class. 否定句：_ 一般疑问句：_（5）She is a singer. 否定句：_ 一般疑问句：_I am not drawing a pictureAre you drawing a picture?They are not playing football.Are they playing football?His father is not a teacher.Is his father a teacher?We are not having a music class.Are you having a music class?She is not a singer.Is she a singer?句型转换1. I am a teacher.(转换成为一般疑问句并作肯定和否定回答) 一般疑问句：_ 回答：_2. They are in Class 4.(转换成为一般疑问句并回答) 一般疑问句：_ 回答：_3. He is my good friend. (转换成为一般疑问句并回答) 一般疑问句：_ 回答：_4. We are having an English class.(转换成为一般疑问句 一般疑问句：_ 回答：_5. She is dancing. (转换成为一般疑问句并回答） 一般疑问句：_ 回答：_Are you a teacher?Yes, I am. /No, Im not.Are they in Class 4?Yes, they are. / No, They arent.Is he your good friend?Yes , he is / No, he isnt.Are you having an English class?.Yes, we are. /No. we arentIs she dancing?Yes, she is . / No, she isntam, is, are的缩写的缩写am, is, are 经常与主语或否定词缩写。经常与主语或否定词缩写。am, is, are与作主语的名词或代词可以缩写在一与作主语的名词或代词可以缩写在一起，去掉起，去掉am, is, are的第一个字母，用的第一个字母，用“”代替。即代替。即amm, are re, is s。如：如：I am a student=Im a student.He is a boy=Hes a boy.You are a girl=Youre a girl.They are friends=Theyre friend.is, are与与not在一起时，也可以缩写，即去在一起时，也可以缩写，即去掉掉not中的中的o，用，用“”代替。如：代替。如：is not isnt, are not arent。如：如： He is not a boy=He isnt a boy. You are not in the Class 4=You arent in the Class 4 Daming and Lingling are not English. = Daming and Lingling arent English.I am = Im You are = YoureHe is = Hes She is = ShesWhat is = Whats It is = Its is not = isnt are not = arentMy name is = My names注意注意: be动词动词am，is，are与其前、与其前、后词的合写。后词的合写。温馨提示：温馨提示：1. am与与not之间没有缩写之间没有缩写； 如：如：I am not a boy不能缩写成不能缩写成 I amnt a boy.2. I am放在句末时不能缩写放在句末时不能缩写；如：如：Are you a boy? Yes, I am.Yes, I am.不能缩写成不能缩写成 Yes ，Im.3. this, these, those不能与不能与is或或are缩写缩写；如：如： This is a book.不能缩写成不能缩写成 Thiss a book. These are friends不能缩写成不能缩写成Thesere friends. Those are books.不能缩写成不能缩写成Thosere books.4. 当两个或两个以上的名词或代词作主语时，当两个或两个以上的名词或代词作主语时，be动词不能与主语缩写。动词不能与主语缩写。 如：如：You and I are students.不能缩写成不能缩写成 You and Ire students. Daming and Lingling are Chinese不能缩写成不能缩写成 Daming and Linglingre Chinese5. 一般疑问句的肯定回答中，句子末尾的一般疑问句的肯定回答中，句子末尾的am, is, are不能与主语缩写。不能与主语缩写。如：如：Are you a boy? Yes, Im. Is he a student? Yes, Hes. Are they friends? Yes ,Theyre. XXXYes,I amYes,he is .Yes,they are.判断下列句子中的缩写有无错误，正确的打，错误的在后面括号内改正过来。 1. Thiss a pencil. Its his pencil. ( ) 2. Are these your apples? No, theyre not. ( ) 3. Thosere not eggs. Theyre oranges. ( ) 4. Whos that boy? Hes Lin Tao. Hes my friend. ( ) 5. Im a teacher. My names Gao Hui. ( ) 6. Are you in Class 6, Grade 1? Yes, Im. ( ) This isThose areI am