八年级上册语法训练unit-5--：动词不定式

1八年级unit5语法训练：动词不定式1.动词不定式的基本形式to+动词原形有时可以不带to(秃头不定式）2.动词不定式的否定形式not+todo3.动词不定式在句子中可以作什成分？1.作主语2.作宾语3.作宾语补足语4.作定语5.作状语6.作表语7.与疑问词等连用4.动词不定式用法/功能，并总结：(1).作主语Toseeistobelieve.It’sexcitingtosurfontheInternet作主语的不定式如果很短，通常位于句首；若不定式（短语）较长时，常用it作形式主语，而把真正的主语（即动词不定式）放在后面以避免头重脚轻。(2)宾语Iwanttogohome.Theworkersdecidedtogetbetterpay.常用动词不定式作宾语的动词有：want,hope,wish,refuse,learn,wouldlike,choose,decide,agree,pretend,expect,plan…HefounditverydifficulttogettosleepThebossmakesthemwork15hoursaday.(3).宾补Theteachertoldmetocleantheblackboard.Iexpectyoutogivemesomehelp.常用动词不定式作宾补的动词有：tell,ask,want,warn,wish,allow,encourage,expect,teach,hel(4).定语Ihavesomethingtosay.Hehasalotofhomeworktodo.(5)状语Hegotupearlytocatchthetrain.Sheisoldenoughtodressherself动词不定式作状语主要用来表示目的，原因，或结果等。(6).表语不定式可以放在be动词后，形成表语。Myjobistohelpthepatient.Yourtaskistocleantheclassroom.(7)与疑问词连用Hedidn’tknowwhattosay.(宾语)Myquestioniswhentostart.(表语)不定式与疑问词who,which,when,how,what等连用，形成带疑问词的不定式。在句中起名词作用，可充当主语、表语、宾语等。在与why连用时，只用于why或whynot开头的简短疑问句中，后面紧跟的动词不定式不带to。Whydosth.?Whynotdosth.?注意几个易错点。21.有些动词既可跟不定式作宾语，也可跟动名词作宾语，但含义不同：remembertodo记住要做某事；rememberdoing记得曾经做过某事forgettodo忘记要做某事forgetdoing忘记曾经做过某事stoptodo停下来去做某事stopdoing停止做某事goontodo继续做另一件事goondoing继续做原来在做的事2.感官动词后既可跟不带to的不定式作宾补，也可跟v-ing作宾补，前者表示动作的全部过程已结束；后者表示动作正在进行。Isawhimcomedownstairs.我看见他下了楼。（说明他下楼了这件事）Isawhimcomingdownstairs.我看见他在下楼。（说明他下楼时的情景）用词适当形式填空1.Mikewants________(go)toaparkonSunday.2.Theteacheroftentellsus___________(notbe)late.3.Mybrotheristooyoung________(join)thearmy.4.Ittakesmeanhour_____(do)myhomeworkeveryday.5.Doyouhaveanything_________(say)?6.Hisparentsoftenmakehim_______(do)alotofexercises.8.Mothertoldhim___________(notplay)footballinthestreet.9.I’mveryglad____________(pass)theexam.10.Yourskirtisnice.Letme_________(have)alook.11.Don’tforget_________(close)thedoorwhenyouleave.12.You’dbetter________(notgo)therebecauseitisdark.13.Ihavealotofhomework_________(do)everyday.14.Wouldyoulike__________(join)us?15.Mywatchneeds_______________________(repair).16.Ifinditimportant________(learn)Englishwell.17.Itisdifficult______________(answer)thisquestion.18.YesterdayIsawtheaccident_________(happen).19.WeoftenhearMary___________(sing)inherroom.20.Wearetired.Let’sstop____________(have)arest.21.It’sverykindofyou__________(think)somuchofus.22.It’seasyforme____________(repair)thebike.23.Iamrichenough____________(buy)acar.24.Whynot__________(go)withme?二．改正1.Themanwastiredenoughtostophavingarest.2.Whatwordscanyouusedescribethebeautifulscene?3.Theteachertoldustonotmakesomuchnoise.4.Theyareoftenseenplayontheplayground.5.You’dbetternottogooutaloneatnight.6.Iwanttofindachairtosit.7.It’sveryniceforyoutohelpme.8.It’sgoodofyoutodomorningexercises.9.HefoundthisdifficulttolearnJapanese.10.Ioftenhearhimsinginginthenextroom.11.Heneedsseeingadoctor.