be 动词的用法一、口诀：我用 am, 你用 are, is 用在他她它，复数全用 are 。
例题： 1. I ____ a boy. _____ you a boy? No, I ____ not. 2. The girl _____ Jack's sister. 3. The dog _____ tall and fat.4. ____________ The jeans on the desk.二、有 be 动词的肯定句和否定句I am from London. I am not from London. He is a teacher. He is not a teacher. She is in the dining room. She is not in the dining room. My hair is long. My hair is not long. Her eyes are small. Her eyes are not small. 归纳：在有 be 动词的句子中，改否定句时只要在 be 动词 ____ 加上 ____ 。
三、有 be 动词的一般疑问句四、 Be 动词在一般过去时中的变化：am--was is --was are--were ⑴am 和 is 在一般过去时中变为 was 。
(was not=wasn't ) ⑵are 在一般过去时中变为 were 。
(were not=weren't )⑶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。
例题：1. I _____ at school just now.2. He ______ at the camp last week.3. We ______ students two years ago.4. They _____ on the farm a moment ago.5. Yang Ling ______ eleven years old last year.6. The mobile phone _____ on the sofa yesterday evening. 2.五、there be 句型中 be 动词的用法1、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 动词根据最近 be 动词的那个名词决定。
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。
例题：用恰当的 be 动词填空。
1. The man with big eyes ____ a teacher.2. ____ your brother in the classroom?3. Where ___ your mother? She _____ at home.4. How _____ your father?5. Mike and Liu Tao ____ at school.Am I a Chinese? Are they American? Is the cat fat? Yes, you are. Yes, they are. Yes, it is. No, you aren't. No, they aren't. No, it isn't.6.Whose dress ___ this?7.Whose socks ___ they?8.That _____ my red skirt.9.Who _____ I?10.Here ____ a scarf for you.11.Here ____ some sweaters for you.12.The black gloves ____ for Su Yang.13.This pair of gloves _____ for Yang Ling.14.The two cups of milk ___ for me.15.Some tea ____ in the glass.16.Gao shan's shirt _____ over there.七，句型转换1.It was exciting.否定句： ______________________________________________一般疑问句： ___________________________________________ 肯、否定回答： _________________________________________2.All the students were very excited.否定句： ______________________________________________一般疑问句： ___________________________________________ 肯、否定回答： _________________________________________3.They were in his pocket.否定句： ______________________________________________一般疑问句： ___________________________________________ 肯、否定回答： _________________________________________4.There was a car in front of the house just now.否定句： ______________________________________________一般疑问句： ___________________________________________ 肯、否定回答： _________________________________________ 肯、否定回答： _________________________________________八，根据句意，用be动词的适当形式填空1.My sister's name ___ Nancy.2.This _____ not Wang Fang's pencil.3.___ David and Helen from England?4.There ____ a girl in the room.5.There ____ some apples on the tree.6._____ there any kites in the classroom?7._____ there any apple juice in the bottle?8.There ____ some bread on the plate.9.There ____ a boy, two girls, three men and ten women in the park.10.You, he and I ____ from China.11. _______________ There a box of rubbers near the books.12. _______________ There lots of flowers in our garden last year.13. _______________ There a tin of chicken behind the fridge yesterday.14. _______________ There four cups of coffee on the table.15.There ______ an apple on the plate yesterday.16.There ______ some milk in the fridge on Sunday.本课学习小结：1 be 动词的用法：我用 __ ; 你用____ ; _____ 用在他她它; 复数全用___ 。
2在有be 动词的句子中，改否定句时只要在be 动词_ 加上___ 。
改一般疑问句时，将 _______ 移到句首。
3be 动词在一般过去时中的变化：am-- ____ ; is -- _______ ; are-- ________4在there be 句型中，主语是单数，be 动词用 ______ ；主语是复数，be 动词用__________ ；如有几件物品，be 动词根据__________ 的那个名词决定。
(mine/yours/his/hers/its/ours/theirs 则相当于形容词性物主代词+名词,故其后不必加名词。
如：Is this your book? No, it isn't，it's hers(her book)一．人称代词练习(1)___________ . is my aunt. (she)(2)__________________ We often visit . ( she )(3)____________________Mike is my classmate. is good at Engliush .(his)(4)____________________________________ Tom wants a glass of milk. Will you pass it to ? ( he )(5)__________________ Mike's friends like very much. ( he )(6)____________________________ They want a football. Give the green one，please. ( they)(7)__________________ It's my bag. Give (it) to me.(8)_____________________ . Thanks for helping ( I ).二．物主代词练习1.These are ___ ( he ) brothers.2.That is ______ ( she ) sister.3.Lily is ______ ( Lucy ) sister.4.Those children are ___ ( I ) father's students.5.Do you know _____ ( it ) name?6. __ (Ann 安)mother is ______ (we) teacher.7.—Whose is this pencil?—It's _______ (I).8._____________ Are these (you)pencils?Yes, they are _______ ( our ) .9.Is this pencil-box Li Lei's? No，__________ is very new. ( he )10._______________—Are these (they)bags ？—No, they aren't _______ (their). They are __________ (we)三．单项选择.1.__________________ This is Wang Fang. is twelve.A.HisB.SheC.HerD.Its2.I__ a girl. _______ name is Wang Hong.A.am;MyB.is;HerC.am;YourD.is;His3._________ Li Lei ___ a boy. is in class 5.A.am;HeB.is;SheC.are;HisD.is;He4. ---- Is the cat ____ -friend? ------- Yes, _____ .A.your;it isn'tB.he;it isC.your;it isD.her;it isn't5. ------- How old is Spotty? -- ______ five.A.its'B.It'sC.itD.its6. what's this? It's __ A.my a B.a my 7 -----What's that? ----------8.–Is Tom a friend of yours?--Yes, he is a friend of . A. I B. me C. my D. mine9. _____________ This is a girl. name is Lily.A.HisB. hersC.HerD.Its10.Is this ___ new bag ? --No, it's _____ .A.his, hisB. his, hersC. yours, myD. hers, your 11. __________________ This new computer is _ , I must look after computer. A. my, mine B. mine, my C. my, my D. mine, mine 12. This is a bird. I don't know _____ name. A.its' B.it's C.it D.its 13.I like ＿＿ new dress.A. SheB. herC. hersD. his14.I often help ＿＿ mother do ＿＿ housework(家务活)。