be動(dòng)詞一般現(xiàn)在時(shí)有三種形式

be動(dòng)詞的一般現(xiàn)在時(shí)有三種形式，即：am,is,are（翻譯為是”）.如果主語(yǔ)是第一人稱I（我）時(shí)，be動(dòng)詞用am。如：Iamastudent.我是一名學(xué)生。Iam還可縮寫成I'm。如：I'mDavid.我是大衛(wèi)。am與not不能縮寫。如：Iamnotabadboy..如果主語(yǔ)是we（我們），you（你，你們）,they（他們，它們，她們）或名詞復(fù)數(shù)（兩個(gè)以上的人或物）時(shí)，be動(dòng)詞必須用are。如：Areyoutwelve?你是十二歲嗎？TomandLilyaregoodfriends.湯姆和莉莉是好朋友。Theyareatschool.他們?cè)趯W(xué)校。are與主語(yǔ)還可縮寫。如：Weare=We'reTheyare=They're,Youare=You're而are與not可縮寫成aren't如:Theyaren'tstudents他們不是學(xué)生。.如果主語(yǔ)是單數(shù)名詞、不可數(shù)名詞或單數(shù)第三人稱代詞(he,she,it)時(shí)，be動(dòng)詞用is。如:Mymotherisateacher.我的媽媽是一名老師。Heisastudent他是一名學(xué)生。is也可與主語(yǔ)縮寫,如：Heis=He's,Mymotheris=Mymother's等。但是Thisis不可縮寫。而is與not可縮寫成isn'to如:Thisisn'tabook,這不是一本書。.句中含有be動(dòng)詞的陳述句變一般疑問(wèn)句。把be動(dòng)詞提到句首，be動(dòng)詞要變大寫。注意第一人稱變第二人稱?；卮饡r(shí)用yes或no表示，結(jié)構(gòu)：Yes,主語(yǔ)+be動(dòng)詞，No,主語(yǔ)+be動(dòng)詞+not。如：Itisabook.變?yōu)椋篒sitabook?.句中含有be動(dòng)詞的肯定陳述句變否定句。先找肯定陳述句中的be動(dòng)詞，在be動(dòng)詞后加not.如：Itisabook.變?yōu)?Itisnotabook.根據(jù)以上敘述我們可以把動(dòng)詞的用法以口訣的形式表述出來(lái)：我(I)用am,你(you)用are,is連著他(he),她(she),它Qt);單數(shù)名詞用is,復(fù)數(shù)名詞全用are。變疑問(wèn)，往前提，句末問(wèn)號(hào)莫丟棄。變否定，更容易，be后not莫忘記。疑問(wèn)否定任你變，句首大寫莫遲疑。Be動(dòng)詞用法練習(xí)題：一.選擇正確的be動(dòng)詞填空1.Iastudent.2.Wefriends.3.Heagoodboy.4.Shemysister.5.Theymyparents.You11yearsold.Iadoctor.8.Myfatherapoliceman.9.Wehavingbreakfast.10.Tom_fromCanada.Hersisteranurse.Theymygoodfriends.Hemybrother.14.She—ten.15.Hismotheranactress.二.用適當(dāng)?shù)腷e動(dòng)詞填空I_aboyyouaboy?No,I-not.ThegirlJack'sister.3yourbrotherintheclassroom?4.Who—I?5.Thejeans-onthedesk.6.There—agirlintheroom.7.Mysister'nameNancy.There-someapplesonthetree.There一aboy,twogirls,threemenandtenwomeninthepark.Thedog_tallandfat.Themenwithbigeyes_ourteacher.Where-yourmother?She_athome.Howoldyourfather?MikeandBob一atschool.Whosedress—this?16.Whosesocksthey?17.Thatmynewbook.18.Hereascarfforyou.19.Heresomebananasforyou.20.TheblackglovesforPeter.21.Thispairofshoesforyou.Therefourbottlesofmilkonthetable.Someteaintheglass.24.DavidandHelenfromEngland?25.thereanydictionariesintheclassroom?26.thereanyapplejuiceinthebottle?27.Theresomebreadontheplate.28.You,heandIfromChina.29.Heretwopensandonebook.30.yourfriendsinBeijing?三.改寫句子1.Iamateacher否定句：一般疑問(wèn)句：肯定回答：否定回答：2.Theyarenewstudents否定句：一般疑問(wèn)句：肯定回答：否定回答：Heisagoodboyathome.否定句：一般疑問(wèn)句：肯定回答：否定回答：WearehavinganEnglishclass否定句：一般疑問(wèn)句：肯定回答：否定回答：BobisinClassOne,GradeSix否定句：一般疑問(wèn)句：肯定回答：否定回答：SheisformJinan.否定句：一般疑問(wèn)句：肯定回答：否定回答：Iamagoodstudentatschool否定句：一般疑問(wèn)句：肯定回答：否定回答：Theyareintheteacheroffice.否定句：一般疑問(wèn)句：肯定回答：否定回答：Hisfatherisapostman.否定句：一般疑問(wèn)句：肯定回答：否定回答：Wearedoingourhomework.否定句：一般疑問(wèn)句：肯定回答：否定回答：Sheisasinger否定句：一般疑問(wèn)句：肯定回答：否定回答：Theyarereadingbooks否定句：一般疑問(wèn)句：肯定回答：否定回答：Iamasmartboy.否定句：一般疑問(wèn)句:肯定回答：否定回答：Thereisadogoverthere否定句：一般疑問(wèn)句：肯定回答：否定回答：Therearealotofgeeseinthefarm.否定句：一般疑