Unit3語(yǔ)法知識(shí)

1、一般疑問句、物主代詞概念 簡(jiǎn)單的說，能用Yes 或No（相當(dāng)于Yes 或No )回答的疑問句叫一般疑問句。 當(dāng)然就目前來說，我們也可以說以Be動(dòng)詞+主語(yǔ)引導(dǎo)的句子叫一般疑問句。1.Is this your pencil ? Yes, it is. /No,it isnt.Its hers.2.Is that your dictionary? Yes, it is./No,it isnt.Its his.3.Are these your books ? Yes, they are. No,they arent.Theyre hers.4.Are those your keys? Yes, the

2、y are. No, they arent.Theyre mine. am ,is , are 引出的一般疑問句n 例如:Are you a boy/Helen?n Is she a teacher? n Is he a student/ jack?n Is a girl a student? Is this/that a book? Are these/those books?一般疑問句的答語(yǔ)要遵循下面幾條規(guī)律：（1）要用Yes(肯定回答）或No( 否定回答）來回答。（2）Yes, 主語(yǔ)+be. No, 主語(yǔ)+be+not.(be和not可以縮寫） 如：Is he a student? Ye

3、s, he is/No,he isnt. Are Li Mng and Wang Fang students? Yes, they are./No, they arent.（3）若一般疑問句的主語(yǔ)是第二人稱，回答中的主 語(yǔ)改為第一人稱。 如：Are you a student ? Yes, I am./No, Im not.(4) 一般疑問句朗讀時(shí)要讀聲調(diào)，而答語(yǔ)要讀降調(diào)。Are you Helen ?Yes,I am ./No, Im not.Is he Jack? Yes, he is./No, he isnt.Is the girl a student?Yes, she is./No,

4、she isnt.Are Lucy and Lily students?Yes, they are./No, they arent.肯定陳述句變否定陳述句、一般疑問句 1.This is a schoolbag.This isnt a schoolbag.Is this a schoolbag? Yes, it is./No, it isnt. 2.They are my grandparents.They arent my grandparents.Are they your grandparents? Yes, they are./No, they arent.3.He is my fat

5、her.He isnt my father.Is he your father? Yes, he isnt./No, he isnt.4.I am a teacher. Im not a teacher.Are you a teacher?否定：be動(dòng)詞后面加（not)一般疑問句：一調(diào)二變?nèi)龁柼?hào)。(一調(diào)：be動(dòng)詞到主語(yǔ)前，大寫變小寫。 二變：第一人稱變第二人稱，大寫變小寫。三問：句號(hào)變問號(hào)） 課堂練習(xí)： 1.This is an English dictionary. (變一般疑問句并作出回答） 2.This is an eraser. ( 變成否定句) 3.Are you Mary? (變成

6、肯定陳述句） 4.Thats (That is可以縮寫) a set of keys. (變一般疑問句并作出答語(yǔ)） 5.He is a boy.(變否定句） 6.Its a dog.(變疑問句并作出回答）7.These are your parents. (變一般疑問句并作出肯定回答）8.Those are watches. (變成否定句)9.Is that your cat? (改為復(fù)數(shù)形式并作否定回答)10.He is my cousin. (變一般疑問句并作出肯定和否定回答)11.Its a dog. (變一般疑問句并作出否定回答）12.Mary is my friend.(變一般疑問句

7、)BeBe動(dòng)詞和其他詞的縮寫1.英語(yǔ)中be動(dòng)詞在某些名詞、代詞及少數(shù)副詞后可用縮寫形式。例如：I am= Im it is=its (用于否定回答) what is=whats my name is=my names is not=isnt are not=arent where is=wheres they are=theyre2.并非任何情況下都能縮寫 (1)this is沒有縮寫，am not, those are, these are也沒有縮寫形式，只有that is=thats.(2)在一般疑問句的簡(jiǎn)略回答中，代詞不能與am,is,are縮寫。例如：Is that a bus？ Ye

8、s, it is.(這里it和is是不能縮寫的) Are you a teacher？ Yes, I am(這里I和am是不能縮寫的). 人稱代詞(分為主格和賓格) 第一人稱 第二人稱 第三人稱主格(單數(shù)) I you he/she/it (復(fù)數(shù)) we you they賓格(單數(shù)) me you him/her/it (復(fù)數(shù)) us you them物主代詞(分為形容詞性和名詞性物主代詞)形容詞性(單數(shù)) my your his/her/its (復(fù)數(shù)) our your their 名詞性(單數(shù)) mine yours his/hers/its (復(fù)數(shù)) ours yours theirs

9、 形容詞性物主代詞起形容詞的作用，用在名詞前；名詞性物主代詞起名詞的作用，不能再修飾名詞。eg: That is his pen. Its not hers. （hers=her pen） 名詞性物主代詞=形容詞性物主代詞+名詞 為避免重復(fù)，有時(shí)可用“名詞性物主代詞”來代替“形容詞性物主代詞+名詞”的形式。eg:My bag is yellow, her bag is red, his bag is bule and your bag is pink. 為避免重復(fù)使用bag，可寫成My bag is yellow, hers is red, his is bule and yours is p

10、ink.例如:1.The pen is Helens(Helen).2.Is the yellow ruler yours(you)？3.那些字典不是她的。 Those dictionaries are not hers.4.Is that her watch？ No, it isnt. Its hers.5.Those are my keys.(改為同義句) Those keys are mine.6.Is this jacket hers？ (改為同義句) Is this her jacket？7.Is this her map？ (改為同義句) Is this map hers？ 8.Are these keys hers(her)？本單元的重點(diǎn)短語(yǔ)：1.給 打電話 call at telephone number2.謝謝你的幫助 Thank you for your help.3.別客氣 Youre welcome.4.勞駕，打擾一下 excuse me5.向某人要求某事 ask sb for sth6.給發(fā)電子郵件到郵箱 e-mail at .com