關(guān)于be動(dòng)詞情態(tài)動(dòng)詞和實(shí)義動(dòng)詞的區(qū)別

1、關(guān)于 be 動(dòng)詞、情態(tài)動(dòng)詞和實(shí)義動(dòng)詞的區(qū)別到目前為止，我們主要學(xué)習(xí)了三類(lèi)動(dòng)詞：be 動(dòng)詞、情態(tài)動(dòng)詞和實(shí)義動(dòng)詞。下面我們分別來(lái)講一下它們得用法。1. be 動(dòng)詞屬于系動(dòng)詞, 在句子中主要表現(xiàn)為三種形式：am is 、 are。后面往往接形容詞或名詞做表語(yǔ)。如：（1）I m young. （young 形容詞做表語(yǔ)）（2）He is a boy.（ a boy 名詞做表語(yǔ)）含有 be 動(dòng)詞的句子在進(jìn)行否定、疑問(wèn)句變化時(shí)，都要在be 動(dòng)詞上變化。（1）變?yōu)榉穸ň洌褐髡Z(yǔ)+be+ not+其他。即，直接在be后not. I m a Chinese boy.（ 變?yōu)榉穸ň洌?You are good. （

2、 變?yōu)榉穸ň洌?He is strict with us. （ 變?yōu)榉穸ň洌?She is from America. （ 變?yōu)榉穸ň洌┮陨纤膫€(gè)句子中都含有 ami is或are,變否定句時(shí)，直接在 am、is 、 are 后面加上not . 即： I m not a Chinese boy. You are not good. He is not strict with us. She is not from America.變?yōu)橐话阋蓡?wèn)句：Be住語(yǔ)+其他？即把be動(dòng)詞提到主語(yǔ)的前面。注意： 當(dāng)肯定句主語(yǔ)為第一人稱(chēng)I和We時(shí)，變一般疑問(wèn)句要變?yōu)榈诙朔Q(chēng)，be動(dòng)詞也要相應(yīng)的變?yōu)閍re.同樣肯定

3、句中的my和our也要變?yōu)閥our.I am a boy.（變?yōu)橐话阋蓡?wèn)句）Are you a student? We are good friends.（變?yōu)橐话阋蓡?wèn)句）Are you good friends?She is from America.（ 變?yōu)橐话阋蓡?wèn)句）f Is she from America?He is strict with us.（ 變?yōu)橐话阋蓡?wèn)句） Is he strict with us? 變特殊疑問(wèn)句：一般的要求為“對(duì)劃線部分提問(wèn)”，即用特殊疑問(wèn)詞 代替劃線的部分，后接省略劃線部分的一般疑問(wèn)句 （一般不再出現(xiàn)劃線部分）。如：I ' mwell.（對(duì)劃線

4、部分提問(wèn)）Howare youShe is from America.（對(duì)劃線部分提問(wèn)） Where is she from?2.關(guān)于情態(tài)動(dòng)詞：初中我們常用的情態(tài)動(dòng)詞主要有：can、may、must、need。我們這里主要以can為例來(lái)說(shuō)明情態(tài)動(dòng)詞的用法。情態(tài)動(dòng)詞后 面必須接動(dòng)詞的原形。情態(tài)動(dòng)詞can的用法類(lèi)似于be動(dòng)詞。不論主 語(yǔ)為第幾人稱(chēng)，變否定就是在can后加not.變疑問(wèn)就是把can提到 句子前面。 變否定句：主語(yǔ)+can +not+ 其他。 I can spell my name.（變否定句）f I can not（can ' t）spell my name.He can s

5、wim.（變否定句） He can' t swim . 變一般疑問(wèn)句：Can +主語(yǔ)+其他？即直接把can提到句首。I can spell my name.（ 變?yōu)橐话阋蓡?wèn)句）Can you spell your name?He can swim.（變?yōu)橐话阋蓡?wèn)句）Can he swim?變特殊疑問(wèn)句：特殊疑問(wèn)詞+一般疑問(wèn)句？I can spell my name.（ 對(duì)劃線部分提問(wèn)）What can you spell? He can swim.（對(duì)劃線部分提問(wèn)）Who can swim?3。實(shí)義動(dòng)詞，也叫行為動(dòng)詞。就我們現(xiàn)在所學(xué)的內(nèi)容來(lái)講，實(shí)義動(dòng)詞所在的句子中一般不存在 be動(dòng)詞。

6、也就是在含有實(shí)義動(dòng)詞的句子變否 定句或疑問(wèn)句時(shí)，一定不能用be動(dòng)詞。那么，實(shí)義動(dòng)詞究竟怎樣用呢？ 正如be動(dòng)詞隨著主語(yǔ)的變化可變?yōu)?am is、are 一樣，實(shí)義動(dòng)詞在肯 定句中，也要隨著主語(yǔ)的變化而變化。當(dāng)主語(yǔ)為第三人稱(chēng)單數(shù)he,she, it 時(shí)，實(shí)義動(dòng)詞要變?yōu)橄鄳?yīng)的第三稱(chēng)單數(shù)；當(dāng)主語(yǔ)為非第三人稱(chēng)單數(shù)I,you（你工we,you（你們）they時(shí)，實(shí)義動(dòng)詞要用動(dòng)詞的原形。而在變否 定句和疑問(wèn)句時(shí)，不能直接在動(dòng)詞上變，而是要借助另一類(lèi)動(dòng)詞：助動(dòng)詞 do、 does。（ 1）肯定句： I have a blue book. He has a brother. She wants to be a

7、 teacher. They like to play basketball.（2） 否定句： 主語(yǔ)+don t/doesn t+ 動(dòng)詞原形 。 其中 do/does 為助動(dòng)詞，是來(lái)幫助實(shí)義動(dòng)詞構(gòu)成否定或疑問(wèn)句的，但加了do/does 后，其后面的動(dòng)詞必須用動(dòng)詞原形。 I have a blue book. （變?yōu)榉穸ň洌?I don' t have a blue book. He has a brother. （變?yōu)榉穸ň洌?He doesn' t have She wants to be a teacher. （變?yōu)榉穸ň洌㏒he doesn' t want to

8、be a teacher. They like to play basketball. （變?yōu)榉穸ň洌㏕hey don' t like to play basketball.（3） 一般疑問(wèn)句：Do/Does +主語(yǔ)+動(dòng)詞原形+其他？句中加了do/does 后，其后面的動(dòng)詞還是必須用動(dòng)詞原形。 I have a blue book.（ 變?yōu)橐话阋蓡?wèn)句）Doyou have a blue book? He has a brother. （ 變?yōu)橐话阋蓡?wèn)句） Does he have a brother?變?yōu)橐话阋蓡?wèn)句） My brother does his homework befor

9、e supper.（ Does your brotherdo his homework before supper? She wants to be a teacher.（變?yōu)橐话阋蓡?wèn)句） Does she want to be a teacher? They like to play basketball.（變?yōu)橐话阋蓡?wèn)句） Dothey like to play basketball?特殊疑問(wèn)句：特殊疑問(wèn)詞+一般疑問(wèn)句？ Your sister likes English best because it ' s interesting對(duì)劃線部分提問(wèn)）Whydoes your sisterlike English best? He does his homework before supper.（對(duì)劃線部分提問(wèn)）Whendoes he do his homework?注意：當(dāng)含有and引導(dǎo)的短語(yǔ)在句中做謂語(yǔ)或賓語(yǔ)，我們把這類(lèi)句子變否定句時(shí)，必須把a(bǔ)nd變?yōu)閛r.如：（