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Be动词、助动词和情态动词专题二：Be动词~•一般现在时中be动词的用法beamisare•（1）am用在I后Iamastudent.I'mhappy.•（2）are用于复数主语和第二人称单数（你，您）等情况AreyouChinese?Theyarebasketballplayers.Thebooksareexpensive.（3）is用在主语是第三人称单数或不可数名词等情况Heismyfriend.Thedogisyellow.Timeismoney.be动词的缩写形式Iam=I'mhe/she/itis=he's/she's/it'swe/you/theyare=we're/you're/they'reisnot=isn'tarenot=aren'twhois=who'swhatis=what'sbe动词的在一般现在时中的各种句型1）肯定句：主语+be+其他成分Sheisbeautiful.2）否定句：主语+be+not+其他成分Sheisnotbeautiful.3）一般疑问句（用yes或no来回答）：be+主语+其他成分+？Isshebeautiful？4）特殊疑问句：疑问词+be+主语（其他成分）+？What'syourname?Who'sthat?be的用法口诀：我用am，你用are,is跟着他、她、它。单数is，复数are，勿忘be的三变化。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。一般现在时中be动词的用法相对简单，上面的口诀基本包括了be动词的各种问题。用am/is/are填空1、She（）astudent.2、Hisjacket（）onthetable.3、We（）family.4、-How（）you?-I（）fine,thanks.5、JackandI（）goodfriends.6、（）sheastudent?7、（）youateacher?•I______anEnglishteachernow.•They_______gladtoseeeachother.•HelenandNancy________goodfriends.•Thelittledog_____twoyearsoldthisyear.•Look,there________lotsofgrapeshere.•There________asignonthechaironMonday.•Today_____thesecondofJune.Yesterday______thefirstofJune.It_____Children’sDay.Allthestudents______veryexcited.•Theskyblue.•Iaboy.•There________(be)somewaterinthebottle.amareareareamwasisisisisiswaswere•16.Theblackgloves______forSuYang.•17.Thispairofgloves______forYangLing.•18.Thetwocupsofmilk_____forme.•19.Sometea______intheglass.•20.Gaoshan'sshirt_______overthere.•21.Mysister'sname______Nancy.•22.This______notWangFang'spencil.•23.______DavidandHelenfromEngland?•24.There______agirlintheroom.•25.There______someapplesonthetree.•26._______thereanykitesintheclassroom?•27._______thereanyapplejuiceinthebottle?•28.There_______somebreadontheplate.•29.There_______aboy,twogirls,threemenandtenwomeninthepark.•30.You,heandI______fromChina.areisareisisisisAreisareAreIsisareare句型转换1.Theyaredoinghousework.(分别改成一般疑问句和否定句)2．Thestudentsarecleaningtheclassroom.(改一般疑问句并作肯定和否定回答)3.Tomisunderthetree.（变为否定句）Aretheydoinghousework?Yes,theyare./No,theyaren’t.Theyaren’tdoinghousework.Arethestudentscleaningtheclassroom?Yes,theyare./No,theyaren’t.Tomisnotunderthetree.4.Theskateboardsareblack.(改成否定句)5.Itsbranchesarelong.(意思不变，改否定句)6.Sheisalwaysagoodstudent.(改为一般疑问句，作否定回答).Theskateboardsarenotblack.Itsbranchesarenotshort.Isshealwaysagoodstudent?No,sheisn’t.助动词do/does什么是助动词？顾名思义，助动词就是帮助动词的，而本身没有实际意义的动词，是具有雷锋精神的词汇。助动词do的三种变化形式do第三人称单数时使用的does过去式diddo的基本用法：1构成否定句2构成一般疑问句及回答3构成特殊疑问句do的各种形式肯定式：do否定式：don't/donotdo用在第一人称单复数、第二人称单复数和第三人称复数作主语，且时态为一般现在时的句子，如：Ilikethatdress.否定句：Idon'tlikethatdress.一般疑问句及回答：-Doyoulikethatdress?-Yes,Ido/No,Idon't.特殊疑问句：Whichdressdoyoulike?does肯定式：does否定式：doesn'tdoes用在第三人称单数作主语，且时态为一般现在时的句子当does出现时，句子中用动词原形。如：Shelikesthatdress.否定句：Shedoesn'tlikethatdress.一般疑问句及回答：-Doesshelikethatdress?-Yes,shedoes./No,shedoesn't.特殊疑问句：Whichdressdoesshelike?按要求改写句子：1.Ithinkheisveryold.(否定句)I______thinkhe______veryold.2.Thissignmeans“Nosmoking”.（改为特殊疑问句）What______thissign_________?3.Myplanthastwogreenleaves.(就划线部分提问)__________________________________________plant_______?4.Ilovemyparents.（改为一般疑问句）___________________________________?don’tisdoesmeanHowmanygreenleavesdoesyourhaveDoyouloveyourparents用动词的适当形式填空。1、They_____(read)Englishinthemorning.2、She_____(like)hercoatverymuch.3、Heusually_____(watch)TVat7:00intheevening.4、Thegirl_____(fly)akiteeveryspring.5、He_____(get)upat7o’clockinthemorning.6、Themanandthewomanalways_____(listen)totheradio.7、Lucy_____(notsing)verywell.8、I_____(notgo)toschoolbybuseveryday.9、Daming_____(run)araceonMondays.10、We_____(do)highjumpwithourfriendsatschool.•11、Thelittlegirls_____(read)Englishintheevening.•12、They_____(like)hercoatverymuch.•13、Sheusually_____(watch)TVwithhersisterintheevening.•14、Thegirlsandtheboys_____(fly)akiteeveryspring.•15、We_____(get)upat7o’clockinthemorning.•16、Mybrotheralways_____(listen)tomusicinhisroom.•17、LucyandLily_____(notspeak)Chinese.•18、I_____(notgo)toschoolbybuseveryday.•19、Daming_____(eat)ahamburgeronMondays.•20、We_____(play)gameswithourfriendsatschool.注意：一般现在时态句的否定句和一般疑问句，当句子中有动词时，我们就用助动词do或是does.如果没有动词时，我们就选用is或是are，也就是“Be”除了原形的“be”之外，还有另外七种形式：am,is,are,been,being,was,were.助动词后接动词原形。•We___________(notwatch)TVonMonday.•Nick___________(notgo)totheschoolonSundays.•_____yourparents_______(read)newspaperseveryday?don’twatchdoesn’tgoDoread·情态动词有一定的意义·无人称和数的变化·除了ought和have通常不带to，后加动词原形·表示说话人的语气或情绪（请求、警告、命令等）情态动词will/wouldcan/couldhave/hadtomay/mightoughttoshall/shouldmust1.can/could1)表示能力IcanspeakEnglishandFrench.Hecandoithimself.2)表示事物一时的特征，理论上的可能性It'salwayswarmhere,however,sometimesitcanbeverycold.Evenanexperiencedteachercanmakemistakes.3)表示允诺，许可-CanIeatsomecakes,mom?-Yes,youcan./No,youcan't.Youcanhavemyseat.Iamgoingnow.4)表示推测-Someoneisknockingatthedoor.Whocanitbe?CanitbeTony?-No,itcan'tbehim.HeisinBeijingnow.No,hecouldn'tbeathief.Could是can的过去式，用法与can类似，常用于过去时中；could用在现在时中表示表示委婉、客气，相当于can。-Couldyouhelpme?/Couldyoudomeafavor?-Sure./Certainly.2.may和might1)表示请求或许可-May/MightIcomein?-Yes,youmay.2)表示可能性的推测Shehaschangedsomuchthatyoumaywellnotrecognizeher.It'stoolate.Ithinkhemay/mi