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Unit 3 Grammarandusage Auxiliaryverb Unit3 本節(jié)課目標 Whatareauxiliaryverbs doesn t Auxiliaryverbs is hasgot was Do Did Do did be am is are was were been do does did have has had modals shall should will would can could may might must need dare Aphrasalauxiliaryverb have got to hadbetter wouldsooner rather than cannot help but be not to besupposedto oughtto usedto beaboutto beableto Auxiliaryverbs Thesmallanimalsarekeptinthecages Heisgivingalecture TheInternethastoomuchinformationthathasnotbeenevaluatedforaccuracy Yourhouseisbiggerandnicerthanmine Iamtogoabroadonbusinesstomorrow 1 be am is are was were been Auxiliaryverbs Tip be作為本動詞表示狀態(tài)或客觀存在等意思 be 不定詞連用 表示約定 義務(wù) 命令等未來的動作或狀態(tài) be 現(xiàn)在分詞構(gòu)成各種進行時態(tài) be 過去分詞構(gòu)成被動語態(tài) be用于have has had后構(gòu)成完成時 1 be am is are was were been Hedidn tfindanyusefulinformationontheInternet Thesekindsoferrorsdonotoccurasoftenwhenpeopleusetraditionalreferencematerials Then whydoeshecomehere Youdoknowalotaboutcomputers NeverdidIseesuchastrangeman 2 do does did Auxiliaryverbs Tip do作為助動詞時的時態(tài) 人稱和數(shù)的變化有do does did三種形式 do 主詞 原形動詞構(gòu)成疑問句 do not 原形動詞構(gòu)成否定句 do not 主詞用于附帶問句 do 原形動詞用于加強語氣句 Never Only 等 do 主詞 原形動詞用于倒裝句 2 do does did Auxiliaryverbs Ihaveneverseensuchastrangeman CanIhavemyhaircutnow Ioftenhavemyassistanthelpmedoit 3 have has had Tip 助動詞have 過去分詞構(gòu)成完成時態(tài) have 受詞 過去分詞表示請或讓別人做某事 have 受詞 原形不定詞表示請或讓某人做某事 4 modals shall should will would can could may might must need dare Auxiliaryverbs Ok Ishalldowhatyousaid Ishallneverdosuchathing Youshallgivemeacigarette orIshalltelltheboss WhereshallImeetyou Auxiliaryverbs Willyougivemeacigarette Thiswillbewhatyouneed Shewouldstandtheresleepingforhours Ok Iwilldoit 4 modals shall should will would can could may might must need dare Auxiliaryverbs CanIhelpyou sir Iamcheckingout Couldyougivemethebill Ofcoursewecanwait Coulditbethechargeforthefruit Ican thelpthinkingofit 4 modals shall should will would can could may might must need dare MustIgowithyou No youneedn t Youmustn tforgetyourmedicalcard Oh itiswetoutside Itmusthaverainedyesterday Soitmustbeslipperyoutside Dobecareful Youneedn thavetoldmethatmuch Auxiliaryverbs 4 modals shall should will would can could may might must need dare Auxiliaryverbs Idarenotsayitisugly Howdareyousayso 4 modals shall should will would can could may might must need dare Auxiliaryverbs Tip shall表示發(fā)言者的意志 包括諾言 決心 強制等 shall用于詢問對方的意向 should表示義務(wù) 責任等 will用于第二人稱疑問句中 詢問對方意志或請求 will 原形動詞用于所有人稱 表意愿 would 原形動詞表示過去一段時間的習(xí)慣 4 modals shall should will would can could may might must need dare Auxiliaryverbs Tip 4 can could在口語中相當于may might 表示許可 can could表示能力 相當于beableto can could表示懷疑 推測 一般用于疑問句或否定句 can could用于慣用語 can thelp或couldn thelp 動名詞表示不得不 忍不住 4 modals shall should will would can could may might must need dare Auxiliaryverbs Tip 5 must表示必須 義務(wù)等 強調(diào)主觀因素 haveto 強調(diào)客觀因素 need可以對must引導(dǎo)的一般疑問句作否定回答 must的否定式表示不準 禁止等意思 must have 過去分詞表示對過去情況的推斷 must 原形動詞表示對現(xiàn)在情況的推斷 needn t have 過去分詞表示過去不必做卻已經(jīng)做了的事 4 modals shall should will would can could may might must need dare Auxiliaryverbs Tip 6 dare作為情態(tài)助動詞 一般只能用于疑問句或否定句中 5 Aphrasalauxiliaryverb have got to hadbetter wouldsooner rather than cannot help but be not to besupposedto oughtto usedto beaboutto beableto Auxiliaryverbs 5 Aphrasalauxiliaryverb Auxiliaryverbs It sgettinglate I ve got togonow Youdon thavetotakeoffyourshoes Manycountrieswouldratherbecautiouswiththisnewtechnology Theticketshadbeensoldout soIcouldnot help butgobackhome Thechildrenaresupposedtobeatschoolbefore8a m 5 Aphrasalauxiliaryverb Auxiliaryverbs Iusedtolovecatsbutnotnow becauseIwasonceattackedbyabigblackcat Hedidn tusetosmokewhenhewasyounger Didheusetocomeasoftenashedoesnow AnswerstoPartA p41 1 have2 haven t3 don t4 didn t5 was6 did7 did8 didn t9 wouldn thave10 will AnswerstoPartB p41 1 wasaboutto2 usedto3 wasn tableto4 wassupposedto5 couldnothelpbut6 wouldrather 1 Reviewwhatwehavelearnedinclass 2 Goovertheexercisesinclass 3 Finishtheworkbookexercises P120 Homework