關于be動詞、情態(tài)動詞和實義動詞的區(qū)別

1、關于be動詞、情態(tài)動詞和實義動詞的區(qū)別新人教版英語七年級上冊復習資料到目前為止，我們主要學習了三類動詞：be動詞、情態(tài)動詞和實義動詞。下面我們分別來講一下它們得用法。 1.    be動詞屬于系動詞, 在一般現在時態(tài)的句子中主要表現為三種形式：am is、are。后面往往接形容詞或名詞做表語。如：(1)Im strong. (strong形容詞做表語)(2)He is a boy.( a boy名詞做表語) 含有be動詞的句子在進行否定、疑問句變化時，都要在be動詞上變化。(1)變?yōu)榉穸ň洌褐髡Z+be+ not+其他。即，直接在be后not.I

2、m a Chinese girl.(變?yōu)榉穸ň?You are right. (變?yōu)榉穸ň?He is strict with me. (變?yōu)榉穸ň?She is from America. (變?yōu)榉穸ň?以上四個句子中都含有am、 is或are，變否定句時，直接在am 、is、are后面加上not.即：Im not a Chinese girl.You are not right.He is not strict with me.She is not from America.(2)變?yōu)橐话阋蓡柧洌築e+主語+其他？即把be動詞提到主語的前面。注意：當肯定句主語為第一人稱I和We時，變一般疑

3、問句要變?yōu)榈诙朔Q，be動詞也要相應的變?yōu)閍re.同樣肯定句中的my和our 也要變?yōu)閥our.I am a worker. (變?yōu)橐话阋蓡柧?Are you a worker?We are good friends. (變?yōu)橐话阋蓡柧?Are you good friends?She is from Japan. (變?yōu)橐话阋蓡柧?Is she from Japan?He is strict with me. (變?yōu)橐话阋蓡柧?Is he strict with me?(3)變特殊疑問句：一般的要求為“對劃線部分提問”，即用特殊疑問詞代替劃線的部分，后接省略劃線部分的一般疑問句（一般不再出現

4、劃線部分）。如：Im well(not bad).（對劃線部分提問）How are you?She is from America. （對劃線部分提問）Where is she from? 2、       關于情態(tài)動詞：初中我們常用的情態(tài)動詞主要有：can、 may、must、need。我們這里主要以can為例來說明情態(tài)動詞的用法。情態(tài)動詞后面必須接動詞的原形。情態(tài)動詞can的用法類似于be動詞。不論主語為第幾人稱，變否定就是在can后加not.變疑問就是把can提到句子前面，它沒有人稱和數的變化。(1)變否定句：主語+c

5、an +not+ 其他。I can spell my name.(變否定句)I can not(cant)spell my name.He can dance. (變否定句)He cant dance.(2)變一般疑問句：Can + 主語+ 其他？即直接把can提到句首。I can spell my name.(變?yōu)橐话阋蓡柧?Can you spell your name?He can sing.（變?yōu)橐话阋蓡柧洌〤an he sing?(3)變特殊疑問句：特殊疑問詞+一般疑問句？      I can spell my name. (對劃線

6、部分提問)What can you spell?      He can play the piano. (對劃線部分提問)Who can play the piano? 3、實義動詞，也叫行為動詞。就我們現在所學的內容來講，實義動詞所在的句子中一般不存在be動詞。也就是在含有實義動詞的句子變否定句或疑問句時，一定不能用be動詞。那么，實義動詞究竟怎樣用呢？正如be動詞隨著主語的變化可變?yōu)閍m、is、are一樣，在一般現在時態(tài)的句子中，實義動詞在肯定句中，也要隨著主語的變化而變化。當主語為第三人稱單數he,she, it時，實義動詞要

7、變?yōu)橄鄳牡谌Q單數；當主語為非第三人稱單數I, you(你), we,you(你們) they時，實義動詞要用動詞的原形。而在變否定句和疑問句時，不能直接在動詞上變，而是要借助另一類動詞：助動詞do、does。（1）肯定句：I have a blue pen.He has a brother. She wants to be an actor. They like to play football.(2)否定句：主語+dont/doesnt+動詞原形。其中do/does為助動詞，是來幫助實義動詞構成否定或疑問句的，但加了do/does后，其后面的動詞必須用動詞原形。I h

8、ave a blue book.（變?yōu)榉穸ň洌㊣ dont have a blue book.He has a brother. （變?yōu)榉穸ň洌〩e doesnt haveShe wants to be a teacher.（變?yōu)榉穸ň洌㏒he doesnt want to be a teacher.They like to play basketball.（變?yōu)榉穸ň洌㏕hey dont like to play basketball.(3)一般疑問句：Do/Does +主語+動詞原形+其他？句中加了do/does后，其后面的動詞還是必須用動詞原形。I have a blue backpac

9、k.(變?yōu)橐话阋蓡柧?Do you have a blue backpack?He has a sister. (變?yōu)橐话阋蓡柧?Does he have a sister?My brother does his homework before supper. (變?yōu)橐话阋蓡柧?Does your brother do his homework before supper?She wants to be a teacher. (變?yōu)橐话阋蓡柧?Does she want to be a teacher?They like to play basketball. (變?yōu)橐话阋蓡柧?Do they like to play basketball?(4)特殊疑問句：特殊疑問詞+一般疑問句？ Your sister likes English best because its interesting. (對劃線部分提問)Why does your sister like English best? He does his homework before supper. (對劃線部分提問)When does he do his homework?注意：當含有and引導的短語在句中做謂語或賓語，我們把這類句子