系动词Be(am,is,are)的用法一、请记住以下口诀:我用am,你用are,is连着他,她,它;单数名词用is,复数名词全用are。变疑问,往前提,句末问号莫丢弃。变否定,更容易,be后not莫忘记。疑问否定任你变,句首大写莫迟疑。二、Be动词在一般过去时中的变化:1.am和is在一般过去时中变为was。(wasnot=wasn’t)2.are在一般过去时中变为were。(werenot=weren’t)3.带有was或were的句子,其否定、疑问的变化和am,is,are一样,即否定句在was或were后加not,一般疑问句把was或were调到句首。相关练习题一、用am,is,are填空1.I___am_aboy.___are___youaboy?No,I___am__not.2.Thegirl___is___Jack'ssister.3.Thedog___is____tallandfat.4.Themanwithbigeyes___is____ateacher.5.__is____yourbrotherintheclassroom?6.Where___is__yourmother?She___is___athome.7.How___is____yourfather?8.MikeandLiuTao_are__atschool.9.Whosedress___is__this?10.Whosesocks___are___they?11.That__is____myredskirt.12.Who__am____I?13.Thejeans__are____onthedesk.14.Here__is____ascarfforyou.15.Here__are____somesweatersforyou.???6.Thetwocupsofmilk___are____forme.17.Sometea____are____intheglass.18.Gaoshan'sshirt___is____overthere.19.Mysister'sname__is_Nancy.20.This__is____notWangFang'spencil.21.__are____DavidandHelenfromEngland?22.There__is____agirlintheroom.23.There___are___someapplesonthetree.24.___are____thereanykitesintheclassroom?25.___is___thereanyapplejuiceinthebottle?26.There___are____somebreadontheplate.27.There___are__aboy,twogirls,threemenandtenwomeninthepark.(or)am28.You,heandI__are____fromChina.二、用be动词的适当形式填空1.I____was___atschooljustnow(刚才).2.He__was_____atthehotellastweek.3.We___were_____studentstwoyearsago.4.They___were_____onthefarmamomentago(刚才).5.YangLing___was_____elevenyearsoldlastyear.6.There___was_____anappleontheplateyesterday.7.There____were____somemilkinthefridgeonSunday.8.Thephone___was____onthesofayesterdayevening.9.I___was___anEnglishteachernow.10.She___was____happyyesterday.11.They___were____gladtoseeeachotherlastmonth.12.HelenandNancy___were____goodfriends.13.Thelittledog__was______twoyearsoldthisyear.14.Look,there___were_____lotsofgrapeshere.15.Today___is____thesecondofJune.Yesterday__was____thefirstofJune.It___was___Children’sDay.Allthestudents__were___veryexciteam,is,are的用法1.is和are可分别与not缩写为isn’t和aren’t,但am却不能与not缩写为amn’t,虽然有人把它缩为ain’t,但这毕竟是规范的口语说法,不宜仿用。2.陈述部分为第一称肯定式时的反意疑问句,通常用aren’t如:I’mlate,aren’tI?我迟到了,是吗?3.不要认为在主语之后总是用am。试看:BothheandIareright.他和我都对。或他和我都不对。NeitherhenorIam(或are)right.他和我都不对.IisanEnglishletter.I是英语字母。4.当am,isare位于句末时,均不能与主语缩写。如:Tellmewhereheis(不能用he’s)。告诉我他在哪儿。HeistallerthanIam(不能用I’m)。他比我高。A:AretheywatchingTV?他们在看电视吗?B:Yes,theyare.(不能用they’re)是的。注:若其后有not时,am,is,are则可以与主语缩写,其中is和are也可与not缩写。如:AretheywatchingTV?-No,they’renot(或theyaren’t).初一英语am,is,are专项练习1.I___am___aboy.__are____youaboy?No,I_am____not.2.Thegirl__is____Jack'ssister.3.Thedog___is____tallandfat.4.Themanwithbigeyes___is____ateacher.5.___is___yourbrotherintheclassroom?6.Where__is___yourmother?She___is___athome.7.How_is______yourfather?8.MikeandLiuTao__are____atschool.9.Whosedress___is___this?10.Whosesocks___are___they?11.That___is___myredskirt.12.Who__am____I?13.Thejeans__are____onthedesk.14.Here___is___ascarfforyou.15.Here__are____somesweatersforyou.16.Theblackgloves___is__forSuYang.17.Thispairofgloves__are____forYangLing.18.Thetwocupsofmilk__are___forme.19.Sometea___are___intheglass.20.Gaoshan'sshirt___is____overthere.21.Mysister'sname__is____Nancy.22.This__is____notWangFang'spencil.23.____are__DavidandHelenfromEngland?24.There__is____agirlintheroom.25.There___are___someapplesonthetree.26.__are_____thereanykitesintheclassroom?27.___is____thereanyapplejuiceinthebottle?28.There____are___somebreadontheplate.29.There___are____aboy,twogirls,threemenandtenwomeninthepark.30.You,heandI__are____fromChina.答案:1amAream2is3is4is5Is6is7is8are9is10are11is12am13are14is15are16are17is18are19is20is21is22is23Are24is25are26Are27Is28is29is30are