Unit1TimetoRelaxGrammar动词不定式课件人教版英语八年级下册

Unit1TimetoRelax八年级英语人教版·下册SectionA(Grammar)Theyareusedasadverbialsofpurpose.一、新课引入What’stheroleofinfinitivesinthesesentences?Shetakesadictionarytoclasstolookupnewwords.Hegoestothelibraryonweekendstoborrowbooks.TheypracticespokenEnglisheverydaytoimproveEnglish.二、新课讲解动词不定式1.动词不定式的构成由“to+动词原形”构成，有些情况下可省略to。是非谓语动词的一种，没有人称和数的变化，在句中不能作谓语。二、新课讲解动词不定式2.用法(1)作宾语，常接动词不定式作宾语的动词有want,refuse,forget,need,try,learn,choose,agree,help,hope,wish,expect,decide,begin,start等。LilywantstofindajobasanEnglishteacherinBeijing.莉莉想在北京找一份英语教师的工作。二、新课讲解动词不定式(2)作宾语补足语，常接动词不定式作宾语补足语的动词有：ask,allow,tell,want,teach,wish,help,warn,invite,encourage等。Samaskedmetohelphim.萨姆让我帮助他。二、新课讲解动词不定式(3)作目的状语，动词不定式作目的状语可以放在句首，一般用逗号与后面的内容隔开，也可以放在句尾。Togetthereontime,

theystartedearly.

为了准时赶到那儿，他们很早就出发了。二、新课讲解动词不定式注意(1)动词不定式的否定形式是由“not+动词不定式”构成。Jimtoldmenottoeatjunkfood.吉姆告诉我不要吃垃圾食品。(2)动词不定式可与疑问词what,

which,how,where

等连用。I

don’tknowhow

todo.

我不知道怎么做。二、新课讲解动词不定式(3)在某些复合宾语中，常用it代替不定式作形式宾语，而把不定式放在后面。IfinditusefultolearnEnglishwell.

我发现学好英语很有用。(4)表示感觉的动词，如see,

hear,

notice,

feel等，以及使役动词let,

have,

make等后常用省略to的不定式。Iheardhersingasonginthenextroom.

我听见她在隔壁房间唱了一首歌。三、归纳小结一、用所给词的适当形式填空1.

Myfatherdecided__________

(spend)

thesummerinYunnan.2.

I

wanttoknowhow

__________

(improve)

myspokenEnglish.3.

It’snecessaryforus__________

(talk)

to

ourparentswhenwehaveproblems.四、强化训练tospendto

improveto

talk4.

LiMingwants__________

(be)

a

doctor

whenhegrowsup.5.

Henry’suncleisplanning

__________

(take)atriptoDunhuangnow.6.

Everyone

should

do

what

he

can__________

(protect)

the

environment.四、强化训练tobetotaketoprotect二、单项选择()1.Weshouldbuildonpastachievementsandworktogether_______

abetterworld.A.make B.making C.made D.tomake()2.Wewillattendtheteafestivalinourtown_______

moreaboutteaculture.A.learning B.tolearn C.learned D.learn四、强化训练DB()3.Thegovernmentisdevelopingnewplans

_______

ancientbuildings.A.protect B.toprotect C.protects D.protected()4.OurEnglishteacherishumorousandheoftentellsfunnyjokestomakeus

_______.A.tolaugh B.laughing C.laugh D.laughed()5.Ourteacheradvisesus

_______

ourselvesinthesunshine.A.enjoy B.toenjoy C.enjoyed D.enjoying四、强化训练BCB三、完成句子1.IhopeIcanwatchthefilmNezha2again.

(改为同义句)Ihope

_______

_______

thefilmNezha2again.2.我的老师建议我发对所有单词的音。(补全句子)Myteacher

_______

_______

_______

_________allthewordscorrectly.3.TheywenttotheparksothattheycouldseetheQueenofHearts.(改为同义句)_______

_