内容正文:
Unit1语法专题:be的一般现在时
(一)定义:1.表示经常或习惯性的动作。2. 或表示事物现在的特征,状态或客观真理。
(二)构成:
(1)口诀:我用am,你用are,is连着他她它,单数名词用is,复数名词全用are
(2)当谓语动词为have时,he/she/it _________, 其余人称用have。
(3)当主语为代词时,可以缩写:
I am=I’m She’s=She is He’s=He is They’re=They are We are=We’re It is=It’s
(4) 含有be动词的肯定句变为疑问句,将be动词提前,变成相应的形式,并大写,注意人称的变化。
(5) 含有be动词的否定,在后面直接加not即可。
(三)be动词的变化:
(1) am用于主语是第一人称I的句子中。
(2) are用于主语是第二人称you或其他人称的复数形式的句子中。
(3) is用于主语是第三人称单数的句子中。
【同步练习】
1、 用be动词的适当形式填空。
1. My name _______ Tom. I _______ in Class7.
2. --What ________ it? --It ________ a bird.
3. He _________ my brother. His name __________ David.
4. --What _________ these? --They ________ pens.
5. I __________ an English teacher/
6. These flowers __________ nice.
7. Lucy and Lily’s room __________ over there.
8. Here _________ your books. They __________ new.
9. This __________ my new book.
10. __________ Jim and Tom from Shanghai?
2、 单项选择。
1. —Are you and Li Lei in the same class?—__________.
A.Yes he is B.Yes, I am C.Yes, they are D.Yes, we are
2. —__________ Lucy from the USA?
—No, she __________ from the USA. She comes from the UK.
A.Does; doesn’t B.Does; isn’t C.Is; doesn’t D.Is; isn’t
3. —Jim, are these your keys?—__________. They’re hers.
A.Yes, it is B.No, it isn’t C.Yes, they are D.No,they aren’t
4. My family __________ a big one. My family __________ all here.
A.is; is B.is; are C.are; are D.are; is
5. —Who __________ your Chinese teacher?—Miss Tang __________.
A.is; does B.does; is C.does; does D.is; is
3、 句型转换。
1. This coat is Helen’s . (变一般疑问句)
______ ______ ________ Helen’s?
2. Lily and Lucy are fifteen years old now . (对画线部分提问)
_____ ______ ______ Lily and Lucy ?
3. Her dog is 2 years old . (变为否定句)
Her dog ____ _____ 2 years old .
4. My bag is yellow and blue. (对划线部分提问)
______ ______ is ______ bag?
5 My name is Sandy.(改为一般疑问句并作肯定回答)
—__________ __________ name Sandy?
—Yes, __________ _________.
6. This is my book.(改为一般疑问句并作否定回答)
—__________ __________ __________ book?
—No, ________