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

PAGEPAGE4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。下面我們分別來講一下它們得用法。be動(dòng)詞屬于系動(dòng)詞,在句子中主要表現(xiàn)為三種形式：amis、are。后面往往接形容詞或名詞做表語。如：(1)I’myoung.(young形容詞做表語)(2)Heisaboy.(aboy名詞做表語)含有be動(dòng)詞的句子在進(jìn)行否定、疑問句變化時(shí)，都要在be動(dòng)詞上變化。(1)變?yōu)榉穸ň洌褐髡Z+be+not+其他。即，直接在be后not.①I’maChineseboy.(變?yōu)榉穸ň?②Youaregood.(變?yōu)榉穸ň?③Heisstrictwithus.(變?yōu)榉穸ň?④SheisfromAmerica.(變?yōu)榉穸ň?以上四個(gè)句子中都含有am、is或are，變否定句時(shí)，直接在am、is、are后面加上not.即：①I’mnotaChineseboy.②Youarenotgood.③Heisnotstrictwithus.④SheisnotfromAmerica.(2)變?yōu)橐话阋蓡柧洌築e+主語+其他？即把be動(dòng)詞提到主語的前面。注意：當(dāng)肯定句主語為第一人稱I和We時(shí)，變一般疑問句要變?yōu)榈诋?dāng)主語為非第三人稱單數(shù)I,you(你),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句時(shí)，不能直接在動(dòng)詞上變，而是要借助另一類動(dòng)詞：助動(dòng)詞do、does。（1）肯定句：Ihaveabluebook.Hehasabrother.Shewantstobeateacher.Theyliketoplaybasketball.(2)否定句：主語+don’t/doesn’t+動(dòng)詞原形。其中do/does為助動(dòng)詞，是來幫助實(shí)義動(dòng)詞構(gòu)成否定或疑問句的，但加了do/does后，其后面的動(dòng)詞必須用動(dòng)詞原形。Ihaveabluebook.（變?yōu)榉穸ň洌鶬don’thaveabluebook.Hehasabrother.（變?yōu)榉穸ň洌鶫edoesn’thaveShewantstobeateacher.（變?yōu)榉穸ň洌鶶hedoesn’twanttobeateacher.Theyliketoplaybasketball.（變?yōu)榉穸ň洌鶷heydon’tliketoplaybasketball.(3)一般疑問句：Do/Does+主語+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。Ihaveabluebook.(變?yōu)橐话阋蓡柧?→Doyouhaveabluebook?Hehasabrother.(變?yōu)橐话阋蓡柧?→Doeshehaveabrother?Mybrotherdoeshishomeworkbeforesupper.(變?yōu)橐话阋蓡柧?→Doesyourbrotherdohishomeworkbeforesupper?Shewantstobeateacher.(變?yōu)橐话阋蓡柧?→Doesshewanttobeateacher?Theyliketoplaybasketball.(變?yōu)橐话阋蓡柧?→Dotheyliketoplaybasketball?(4)特殊疑問句：特殊疑問詞+一般疑問句？YoursisterlikesEnglishbestbecauseit’sinteresting.(對(duì)劃線部分提問)→WhydoesyoursisterlikeEnglishbest?Hedoeshishomeworkbeforesupper.(對(duì)劃線部分提問)→Whendoeshedohishomework?注意：當(dāng)含有and引導(dǎo)的短語在句中做謂語或賓語，我們把這類句子變否定句時(shí)，必須把a(bǔ)nd變?yōu)閛r.如：(1)Hecanswimanddance.（變?yōu)榉穸ň洌鶫ecan’tswim