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be动词的一般现在时有三种形式，即：am, is, are（翻译为“是”）1. 如果主语是第一人称I（我）时，be动词用am。如：I am a student. I am 还可缩写成Im am 与 not 不能缩写。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? are与主语还可缩写。如： Were， Theyre, Youre。 而are与 not可缩写成arent3. 如果主语是单数名词、不可数名词或第三人称单数代词（he, she, it）时，be动词用is。如:My mother is a teacher.is也可与主语缩写,如: Hes，My mother is = My mothers等。但是This is不可缩写。而is与not可缩写成 isnt4. 句中含有be动词的陈述句变一般疑问句。把be动词提到句首，be动词要变大写。注意第一人称变第二人称。回答时用yes或no表示，结构：Yes, 主语+be动词，No，主语+be动词+not。5. 句中含有be动词的肯定陈述句变否定句。先找肯定陈述句中的be动词，在be动词后加not.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：我用am，你用are， is跟着他(he)，她(she)，它(it)；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。There be句型1、There be 的固定句型：There be + 某物/某人 + 介词 + 某地表示：在某地有某物（或人）2、在there be 句型中，主语是单数，be 动词用is ;主语是复数，be 动词用are ; 如有几件物品，be 动词根据最靠近be 动词的那个名词决定。3、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。4、there be句型与have(has) 的区别：there be 表示在某地有某物（或人）have(has) 表示某人拥有某物基础练习一一选择正确的be动词填空1. I _ a student. 2. We _ friends.3. He _ a good boy 4. She _ my sister.5. They _ my parents. 6. You _ 11 years old.7. I_ a doctor. 8. My father_a policeman.9. We_having breakfast. 10. Tom_from Canada.11. Her sister_a nurse. 12. They_my good friends.13. He_my brother. 14. She_ ten.15. His mother_an actress.2、 句型转换1、The cat is beautiful.否定句：一般疑问句：肯定/否定回答：2、Her sisters are students.否定句：一般疑问句：肯定/否定回答：3、 用“have,has”or “there is , there are”填空1. I_a good father and a good mother.2. _a telescope on the desk.3. He_a tape-recorder.4. _a basketball in the playground.5. She_some dresses.6. They_a nice garden.7. What do you_?8. _a reading-room in the building?9. What does Mike_?10. _any books in the bookcase?11. My father_a story-book.12. _a story-book on the table.13. _any flowers in the vase?14. How many students_in the classroom?15. My parents_some nice pictures.16. _some maps on the wall.17. _a map of the world on the wall.18. David_a telescope.19. Davids friends_some tents.20. _many children on the hill。基础练习二1、 用be的适当形式填空1.-How_ you? -I_ fine.2.I_ David,and my family name_ Green.3.-What color _ your clock? -It_ white.4.-What_ this in English?-It_ an apple.5.Toy_my brother.David_my brother,too.They _ my brothers.6.Look!These_apple trees.7.We_ good students and you_ good teacher.8.My sister and my brother_ students.9._there many eggs in the kitchen?10._your card number 5578?11.Where_ your pencils?12.These sweaters _ fifty dollars.13.How much _ his jacket?14.My brothers birthday_ December 11th.15.When _ Kates birthday?16、There_a boy and two girls beside the gate.17、Five and three _ eight.二、将下面的句子变成一般疑问句并作出回答1. That is my football.2. Those are his books.3. Jim and Tom are good friends.4. My birthday is November 1st.5. His son is twelve years old.三、将下面的句子变成否定句1. His card is on the table.2. These are my parents.3. Bob and Tony are our friends.4. These things are five dollars.5. The girl is his sister.四、改写句子1. I am a teacher.否定句：一般疑问句：肯定回答： 否定回答：2. They are new students.否定句：一般疑问句：肯定回答： 否定回答：3. He is a good boy at home.否定句：一般疑问句：肯定回答： 否定回答：4. We are having an English class.否定句：一般疑问句：肯定回答： 否定回答： 5. Bob is in Class One, Grade Six.否定句：一般疑问句：肯定回答： 否定回答： 6. She is form Jinan.否定句：一般疑问句：肯定回答： 否定回答： 7.I am a good student at school.否定句：一般疑问句：肯定回答： 否定回答：
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