1、小学英语语法专项be动词一、be动词的现在式有：am，is，are。使用口诀：我用am，你用are，is就用他她它，复数全用are。句子结构为：主语+be动词+其他。当主语为第一人称单数I（我）时，be动词用am。如：Im a student. （注：Im=I am）我是一名学生。当主语为第二人称you（你，你们）时，be动词用are。如：Youre a teacher.（注：Youre=You are）你是一名教师。 You are my friends. 你们是我的朋友。当主语为第三人称单数（he，she，it），不可数名词或其他单数名词时，be动词用is。如：Hes a boy.（注：H
2、es=He is）他是个男孩。 Shes a girl. （注：Shes=She is）她是个女孩。Its an elephant.（注：Its=It is）它是一头大象。My fathers a doctor.（注：My fathers=My father is）我的爸爸是一位医生。当主语为复数时，be动词用are。如：Theyre cold. （注：Theyre=They are）他们很冷。 Tom and I are friends. 汤姆和我是好朋友。 The children are cute. 孩子们很可爱。 The apples are red.那些苹果是红的。含有be动词的否定
3、句，在be动词后加not。句子结构为：主语+be动词+not+其他。如：Im not a teacher. 我不是一名教师。 She is not my sister. 她不是我的妹妹。练习一：用适当的be动词填空。1. My name _ Jenny.2. Lily and Lucy _ best friends.3. The students _ in the classroom.4. I _ a nurse.5. The mouse _ small.6. The dog _ mine.7. The pants _ blue.8. Here you _.9. There _ water i
4、n the cloud.10. Michaels shirt _ white.11. That _ not my textbook.12. My grandparents _ old.把下列肯定句改为否定句。13. I am a student._14. Shes my friend._15. They are at home._16. The flower is beautiful._17. You are a nurse._二、含有be动词的疑问句特殊疑问句。结构：疑问词+be动词+主语+其他+？如：What is your name? (注：What is= Whats) 你叫什么名字？
5、 How are you going to school? 你怎么去学校？ What am I going to do? 我能够做些什么？ Where is he going? (注：Where is= Wheres) 他要去哪儿？一般疑问句。结构：be动词+主语+其他+？如：Are you a student? 你是一名学生吗？肯定回答：Yes, I am.否定回答：No, Im not.Is this your book? 这是你的书吗？肯定回答：Yes, it is. 否定回答：No, it isnt. (注：isnt=is not)练习二：用适当的be动词填空。1. _ your si
6、ster in the classroom?2. Who _ I?3. Whose book _ this?4. Whose shoes _ they?5. How _ you?I_ fine.6. How _ your mother?7. What color _ this?8. This _ not my pencil.9. _ Emily and John from the U.S.?10. _ I cool now?11. _ he doing dishes?12. _ there water in the cloud?13. _ there peaches in the basket
7、?把下列陈述句改为一般疑问句。14. This is an elephant._15. They are happy._16. We are going to go sightseeing._参考答案练习一：1. is 2. are 3. are 4. am 5. is 6. is 7. are 8. are 9. is 10. is 11. is 12. are13. I am not student.14. Shes not my friend.15. They are not at home.16. The flower is not beautiful.17. You are not a nurse.练习二：1. Is 2. am 3. is 4. are 5. are; am 6. is 7. is 8. is 9. Are 10. Am 11. Is 12. Is 13. Are14. Is this an elephant?15. Are they happy?16. Are we going to go sightseeing?
