不定式用法總結判斷句子對錯。Toseeistoblieve.Dohomeworkisveryboring.Playingcomputergamesisveryexciting.Beingascientistisalwaysherdream.Seeyounextweek.IforgetclosethedoorsoIreturnedagain.Stoptellinglies.Youmustforgettellingmeallaboutit.It’sgoingtorain.Don’tforgettotakeanumbrellawithyou.不定式的定義。Eg,Tohelpthepoorisalwaysherdream.Helpingothersfeelsgood.不定式基本形式是to+do.Eg,towalk,tohelp,etc.動名詞由動詞+ing構成。不定式的基本用法。不定式和動名詞可以用作句子的主語及賓語。它們又被稱為“非謂語動詞”，即它們在句中是不能充當謂語的。Eg,用括號中的詞的正確形式填空。________helpsyoulearningEnglish.(read)________isimportant.(learn)________Englishisimportant.(1),Assubjectofasentence.作為句子主語.Tosayisalwayseasierthantodo.Tostudyhardincresesyourchancetogotocollege.注意點：1,不定式做主語，謂語動詞應用三單形式。Eg,Toeatlotsofdesserts(甜點)isunhealthy.Todosportsmakesyouhealthier.2，動名詞也可以做主語。兩者的區別在于動名詞表示一種習慣性，重復發生的動作，更為具體，而不定式有將來，一次性的含義，較為抽象。也因為不定式有未發生的含義，如果表示過去已發生的事情，主語只能用動名詞。Eg,TalkingtoyouwasthemoststupidthingIhavedone.3，不定式做主語常置于句末，而用it代替其作形式主語，避免句子頭重腳輕。Eg,Tofeedtheanimalsismyjob.It’smyjobtofeedtheanimals.It’snoteasytolearnaforeignlanguagewell.=Learningaforeignlanguageisnoteasy.It’sdifficultforustofinishthework.It’shardformetoansweryourquestion.It’sverykindofyoutohelpme.It’sfoolishofhimtogooutalone.Itis+adj+for/ofsbtodosth.若形容詞指人，則用of,若形容詞指物，則用for。練習：()1,_________toanothercitywasahardchoiceforher.A,MoveB,TomoveC,Moving()2,It’snecessary_________someEnglishgrammer.A,forusstudentstolearnB,forwestudentstolearnC,ofusstudentstolearnD,ofourstudentslearning（2），作為句子表語。eg,Whatyoushoulddoistoleavehereatonce.Theproblemishowtodoit.不定式前可以加疑問詞。（3），作為句子賓語，放于動詞后面。Eg,Shewantstogotoamovie.Maryneedstotalkaboutherproblems.作為賓語的不定式用法，需要結合動詞的固定搭配來記憶。有些動詞只能跟不定式賓語，常見的有：want,decide,hope,agree,fail,wish等。Iwishtohaveapairofwings.Theyfailedtocatchthelastbusthismorning.2，有些動詞只能接動名詞做賓語，如finish,practice,enjoy,keep,bebusy等。Eg,Haveyoufinishedreadingthebook?3，有些動詞即可以接不定式賓語，又可以接動名詞賓語，兩者沒有明顯區別。如：liketodo/doing,begintodo/doing,starttodo/doingItstartstorain.=Itstartsraining.4，有些動詞接不定式賓語和接動名詞賓語則有明顯的意思上的區別：Stoptodo:停止一件事，去做另一件事情Stopdoingsth:停止正在做的事情Eg,Whentheteacherwalkedin,westoppedtalking.Whentheteacherwentout,westoppedtotalk.Forgettodo:忘記要做某事Forgetdoingsth:忘記做過某事Eg,Heforgettobringhishomeworktoclassagain.Heforgetturningoffthelights,sohereturnedandmadesure.他忘了自己已經關了燈，所以他又回去確認了一下。Trytodo:盡力做Trydoingsth:嘗試做Eg,I’mtryingtolearnEnglishwell.我決心（盡力）學好英語。Itriedknockingatthebackdoor,butnobodyanswered.我嘗試著敲了敲后門，但沒人回應。Meantodosth:打算做，想做Meandoing:意味著YouknowwhatImeantosay.你知道我打算說什么的。Givingupmeansfailingagain.放棄意味著又一次失敗了。Goontodo:繼續做另一件事，和之前做的事情不是同一件Goondoingsth:繼續做之前在做的事情練習：（）1，Myfatherissleepingsoundly,soItriedmybest__________anynoise.A,makenotB,tomakenotC,tomakeD,nottomake()2,Weagree_______herebutsofarshehasn’tturnedupyet.A,havingmetB,mettingC,tomeetD,tohavemet()3,—Thelightintheofficeisstillon.—Oh,Iforgot_______.A,turningitoffB,turnitoffC,toturnitoffD,havingturneditoff()4,Goon____theotherexerciseafteryouhavefinishedthisone.A,todoB,doingC,withD,tobedoing()5,Onmywayhome,Istopped________somefood.A,buyB,tobuyC,buyingD,bought（4），作為句子賓語補足語，即放在賓語后面充當補充成分。Eg,Shewantsustoworkhard.Maryaskedhermothertobuyheracake.Tell,ask,want,order,teach,invite,wish,get,help等詞后面常接不定式做賓補，即v+sb+todo.如：Itellhimnottogotherebybus.Edison’smothertaughthimtoreadandwrite.Whatdoyouwantmetodo?注意：其中help也可以用作helpsbdosth,兩者沒有明顯差異。Let,make,have通常后面加省略to的賓補。Eg,Pleaseletusfinishitourselves.Don’ttrytomakemecry.Hear,lookat,see,watch,find,feel,notice等感官動詞賓補可以接doing或者do,加doing強調正在發生，加do強調全過程。Eg,Canyouhearsomeonesingingnextdoor?LastnightIheardsomeonesingallnight.練習：()1,Theteacheraskedus_________somuchnoise.A,don’tmakeB,notmakeC,notmakingD,nottomake()2,Thewokrerswantus_______togetherwiththem.A,workB,toworkC,workingD,worked()3,Theyknewherverywell,theyhadseenher_______upfromchildhood.A,growB,grewC,growingD,wasgrowing()4,Thesadmusicnearlymademe___.A,cryB,cryingC,tocryD,cried()5,Don’tletyourkids_____about.It’sdangeroushere.A,runB,turunC,runningD,ran()6,Myteacheradvises______alot,andsheadvisesus____atleasttwiceaweek.A,reading,readingB,toread,toreadC,reading,toreadD,toread,reading（5），作為定語放在名詞后。Eg,Iwantsomethingtoeat.我想要點吃的。Toeat修飾something,作為定語成分。Hiswishtobecomeanactorwaswellknown.他想成為演員的夢想人盡皆知。（6），作為句子狀語。A,目的狀語(表示目的)Eg,Icometoseeyou.Herunsfasttogetthereintime.Weraisedalotofmoneytohelpthesepoorchildren.注：此時不定式也可以放在句子前面。如：Togetthereintime,herunsfast.B,原因狀語:放在sorry,glad,surprised,disappointed,excited等詞后面。Eg,I’mgladtoseeyouhere.因為在這里見到你我很高興。I’msorrytotroubleyou.C,結果狀語Eg,Someapplesintreearehardtoreach.樹上有些蘋果夠不著。Theroomislargeenoughtohold100people.這個房間足夠大來容納一百個人。Wearrived,onlytofindnoonethere.我們到了之后，結果只發現沒人在那里。(onlytodo…是一個固定搭配，通常表示一個結果)練習：()1,Thenewsreportershurriedtotheairport,only______thefilmshadleft.A,totellB,tobetoldC,tellingD,told()2,Shemadeacandle_______uslight.A,giveB,gaveC,togiveD,given()3,Iwassurprised_______soquickly.A,watchinghimtoeatB,watchhimeatC,watchinghiseatD,towatchhimeat()4,Iwenttothepostoffice___someletterstomyfriends.A,forsendingB,sendC,tosendD,sending()5,Thisfamouscityisaverypleasantplace__________.A,tovisitB,tovisitinC,tobevisitD,tovisitit()6,Thechairlooksveryold,butinfactitisverycomfortableto______.A,sitB,sitonC,besatD,besaton不定式中重要的固定搭配。onlytodo…翻譯下列句子：Hehurriedbacktohishouse,onlytofindthatitwasempty.Shesurvivedtheaircrash,onlytodieinthedesert.（aircrash飛機撞擊事故）Irantothestation,onlytoseetrainwasoutofthestation.Heenjoyedlaughingatothers,onlytofindhimselflaughedat.2,too+adj/adv+todo翻譯下列句子：Youaretooyoungtounderstand.Hewastoodrunktodrivehome.Theboxwastooheavyforhertocarry.3,…+adj+enough+todosth翻譯下列句子：Youareoldenoughtosupportyourself.Theiceisthickenoughtowalkon.練習：找出不定式充當的成分：Toselecttherightcolorsisimportantforbusiness._____________________MydreamistogotoBeijingUniversity(北京大學).___________________Westernbrides(新娘)choosetowearwhiteontheirweddings（婚禮）._________________Toattractmorecustomers,theypainttheirrestaurantred.___________________I