新人教版八年级下册英语动词不定式详细讲解课件

人教课标版八年级英语

（下册）课题：动词不定式的用法

人教课标版八年级英语

（下册）课题：动词不定式的用法知识回顾比较下列两组句子第一组:EverymorningIkeeponrunning.Helikesplayingtennisafterschool.第二组:Myfriendswantmetogooutwithhim.

Jackinvitesmetogoshopping.知识回顾比较下列两组句子不定式定义及构成(一)动词不定式定义:

动词不定式是指动词的一种不带词形变化从而不指示人称、数量、时态的形式，属于非谓语形式。(二)动词不定式构成：

to+动词原形省“to”的不定式不定式定义及构成(一)动词不定式定义:to+动词原形A:Iwanttobuysomebooks.B:Theywantedtobuysomebooks.C:Hedecidestogohomebyhimself.to+动词原形A:Iwanttobuysomeb动词后省"to"的不定式(一)感官动词：

see,watch,notice,lookat，hear,listento,feel.A:Hesawsomebirdsfallintotheriver.B:Ioftenhearthegirlsinginthenextroom.C:Theylookedatthatpersongointothestore.动词后省"to"的不定式(一)感官动词：动词后省"to"的不定式(二)使役动词:

make,let,have.A:Mymothermakesmegotoschool.B:Lettheboygo.动词后省"to"的不定式(二)使役动词:动词后可省可不省“to”的不定式

(三)特殊动词HelpA:Ioftenhelpmymotherdohousework.B:MyclassmateshelpmetolearnEnglish.动词后可省可不省“to”的不定式

(三)特殊动词Help不定式的否定形式1.带to的动词不定式的否定Iwantyoutogonow.Iwantyounottogonow.直接在“to”前加not2.省to的动词不定式的否定Lettheboygoout.Lettheboynotgoout.直接在动词前加"not"不定式的否定形式1.带to的动词不定式的否定动词不定式用法动词不定式放在一些动词后面可以作宾语、宾语补足语、目的状语、表语等。动词不定式用法

动词不定式用法(一)动词不定式作宾语动词不定式可以放在一些动词后用作宾语，动词不定式作宾语的常用动词有:beginask,want,forget,remember,learn,hate

等。

A：Iwanttogohomenow.B:Sheforgetstotakesomemedicine.C:Mymotherlearnstodance.动词不定式用法不定式作宾语结构WanttodosthNeedtodosthDecidetodosthLearntodosthWishtodosthTrytodosthHopetodosthPlantodosth不定式作宾语结构WanttodosthWishto练习A:我想买一些书。Iwanttobuysomebooks.B:他们需要做更多的运动。Theyneedtodomoreexercise.C:他希望离开学校。Hehopestoleaveschool.练习A:我想买一些书。动词不定式用法(二)动词不定式作宾语补足语。动词不定式作宾语补足语表示宾语所做的动作，可以用动词作宾语补足语的动词有：tell,ask,want,invite,expect,help等。动词不定式用法(二)动词不定式作宾语补足语。A:Iwantyoutogo

now.B:Herparentswishhertobeateacher.C:Heinvitesmetogoswimming.A:Iwantyoutogonow.动词不定式作宾补结构AsksbtodosthInvitesbtodosthTellsbtodosthExpectsbtodosthWantsbtodosthWishsbtodosthAdvisesbtodosth动词不定式作宾补结构AsksbtodosthWant根据汉语完成句子:

我们需要想出一个好计划

Weneed_____________________________aplan.

我们每人打电话给10个人,请他们来.Weeach______________tenpeopleandaskthem_______________.

他们总是自愿贡献他们的时间来帮助他人.Theyalways________theirtime________________otherpeople.

他咳嗽的厉害,他的医生让他戒烟.Hehasaterriblecough.Hisdoctoraskedhim______________________smoking.新人教版八年级下册英语动词不定式详细讲解课件动词不定式的用法(三)动词不定式作目的状语。动词不定式作目的状语常用在go,come,hurry等不及物动词后，表目的。A:Hewenttoseehissisteryesterday.B:ShegoestoEnglandtolearnEnglish.动词不定式的用法(三)动词不定式作目的状语。Thegirlcouldvisitthesickkidsinthehospitaltocheerthemup.Shestillsthereonceaweektohelpkidslearntoread.Shewenthometohavebreakfast.Imakealotofmoneytohelpthesickkids.Istudyhardtogetgoodgrades.新人教版八年级下册英语动词不定式详细讲解课件结语动词不定式定义动词不定式结构