Unit2HealthyLifestyleDiscoverUsefulStructures课件高中英语人教版选择性

HealthyLifestyleDiscoverUsefulStructuresUnit2

Lookatthefollowingsentencesandpayattentiontotheitalicizedinfinitives.Findmoreinfinitivesinthereadingpassage,andtelltheirmeaningsandfunctions.1.Tochangebadhabits

isnevereasy.2.Ittookthesurgeon

threehourstofinishmymother'slungsurgery.3.Tojoin

thePeople'sLiberationArmy,itisrequiredformentoshaveofftheirbeards.4.Itwasnotpolitetodisturbyourneighbourswithloudmusiclastnight.5.

Topreventharmfulhabitslikethesefromdominatingateenager'slifeisessential.6.Itcanbeeasyforsomeofthemtoformbadhabits.7.Afterall,itisnoteasytobreakbadhabits.总

结1.以上句子中动词不定式都是作

。2.句(2)(3)(4)(6)(7)中it作

，真正的主语是后面的

。主语形式主语动词不定式Lead-in不定式和动名词作主语的区别1.Toteachyoutheusesoftheinfinitiveismyjobtoday.2.Teachingismyjob.3.Togetagoodgradeinthisexam

ismyaimtoday.4.Playingfootballismyhobby.________（get)agoodgradeinthisexamismyaimtoday.

________（do)morningexercisesisgoodforyourhealth.________（read)thebookagainisnecessary.Toseeistobelieve.=Seeingisbelieving.前后保持一致PracticeToreadTogetDoing(表具体行为)(表经常性行为)不定式做主语表示

具体的某次动作

,特别是指将来的动作；动名词做主语表示

经常性的、一般性动作

。不定式作主语基本用法一.动词不定式作主语，位于句首，谓语动词用单数。两个或两个以上动词不定式并列作主语，若语意不一致则用复数；但如果动词不定式作为一个整体或属于同一概念，仍用单数。Toimprovepeople’slives

and

tospeedupsocialist

construction

are

our

two

important

tasks

today.Earlytogotobedand

earlytorise

makes

a

man

healthy.Tolove

andtobeloved

is

thegreatesthappinessonecanget.二.it作形式主语为了避免头重脚轻，常用it作形式主语放在句首，作主语的不定式常置于句末。不定式作主语基本用法

Itisnotrightforpeoplewiththevirustogotopublicplaces.

Itwasnotpolitetodisturbyourneighbourswithloudmusiclastnight.TojointhePeople’sLiberationArmy,

itisaruleformen

toshaveofftheirbeards.

Ittookthesurgeonthreehourstofinishmymother’slungsurgery.Itwashard

himtoliveonhissmallincome.依靠他那点工资维持生活很难。Itwascareless

youtoleaveyourumbrellaonthetrain.你真粗心，把伞忘在火车上。比如：easy,difficult,comfortable,pleasant,dangerous，tiresome,interesting,heavy等。forof在Itis+adj.+forsbtodo...句型中这类形容词常表示某个人做某件事是怎么样的情况。

比如：good，kind，nice，foolish，polite，considerate，careless等。在

Itis+adj.+ofsbtodo...句型中，这类形容词常表示人的性格、品质

注意：常用句型1：Itis+adj.+for/ofsb+todosthItisanhonourtobeinvitedtothisactivity.Itismydutytopickyouupattheairport.Itisashametogiveupnowsinceyouhavebeenworkingonit.apity, ashame, apleasure, one’sduty, one’sjob, goodmanners, badmanners等

注意：常用句型2：Itis+n.+(forsb.)todosth.常见的名词Ittookmemorethananhourtodomyhomeworkyesterdayevening.Itwilltakeusalotofmoneytobuythathouse.做某事花费某人多长时间(钱)

注意：常用句型3：Ittakes/took/willtake

sb.some

time/moneytodosth.三.疑问词how,what,when,where,which连用构成不定式短语做主语。不定式作主语基本用法1.________________________________isstillunknown.

哪里开会还未知。2.________________________________hasnotbeendecidedyet.

如何解决这个问题还未决定。3.________________________________________inthisriverisaproblem.

怎样阻止他们在这条河里游泳是一个问题。4.Whattodoandhowtodoit______yourownbusiness.

去做什么以及怎样去做，是你自己的事。WheretoholdthemeetingHowtosolvetheproblemHowtopreventthemfromswimmingare四.注意事项不定式作主语基本用法有时候用It做形式主语，动名词做真正的主语Itisnousetryingtoconvincehim.Hewon’tlisten.It’snogoodstayinguplateeveryday.It’sbadforyourhealth.Itisawasteoftimeplayingonlinegames.1.Itisnouse(good)doingsth.2.Itisuselessdoingsth.3.Itisnofundoingsth4.Itisworthdoingsth.5.Itisawasteoftimedoingsth.常见的句型有1.__________(ignore)thiswouldbeamistake.

2.Howrudeitwasoftheboy___________(jump)thequeue!

3.________(do)morningexercisesisgoodforyourhealth.4.Tosavemoneyandtoliveahealthylife______mygoalsthisyear.5.Hetolduswhether________(have)apicnicwasstillunderdiscussion.

6.Itismyambition__________(make)surethatthedisabledpeoplehaveaccesstoallpublicbuildings.

7.Itisnotdifficult__________(grasp)aforeignlanguageifyouspendtimeandeffortonit.

8.Itisgoodmannersforyou__________(give)yourseattotheold.

9.Itisnouse________(try)togetbackthelosttime.10.Whatapityitisforyou________________(miss)suchagoodfilm.

ToignoretojumpDoingaretohavetomaketograsptogivetryingtohavemissedPractice1.__________________________intenmonthswasagreatachievement.

10个月内就盖成那座楼是一个了不起的成就。2.Itisnotverygoodforyou_____________________.

抽这么多烟对你(身体)很不好。3.___________________istoberespected.

尊重别人就是尊重自己。4.Itisnotaneasything_____________________.

精通一种语言是不容易的。5.Itmadeusveryangry___________________________.

听他那样谈话我们非常气愤。

TocompletethatbuildingtosmokesomuchTorespectotherstomasteralanguagetohearhimtalklikethatPractice6._____________withthissituationreflectsone'sability.

如何应对这种状况反映出一个人的能力。7.Itfeelsgood________________forawhile.

出来在这里待一会儿是挺舒服的。8.It'snecessary______________________whenyoudonotuseit.

当你不用车的时候,锁车是有必要的。9.Itonlytook(us)ayear_______________________.

完成这项工程只花了(我们)一年时间。10.It'skind_________________somuchofus.

你为我们想得那么多,真是太好了。HowtodealtobeouthereforyoutolockthecartocompletetheprojectofyoutothinkPracticeJointhewordstomakefullsentences.(P17)1.important/avoid/passivecigarettesmoking

Itisimportanttoavoidpassivecigarettesmoking.2.willtake/nutritionspecialist/abalanceddietmenu/make/anhour/foryou_______________________________________________________________3.useful/turnto/fitnessconsultant/foradvice_______________________________________________________________4.illegal/dangerous/takedrugs_______________________________________________________________5.harmful/skipbreakfast/often_______________________________________________________________Itwilltakenutritionspecialistanhourtomakeabalanceddietmenuforyou.Itisusefultoturntofitnessconsultantforadvice.Itisillegalanddangeroustotakedrugs.Itisharmfultooftenskipbreakfast.Completetheconversationswiththecorrectformsofthephrasesinthebox.1.A:Hello,doctor.Iwanttoloseweight,butIjustcan'tseemtodoit.Whatcanyoudotohelpme?B:Well,first,it'snecessaryto______________whatyoueat.Cutoutallfattyfoodandsugarydrinks,andeatmorefruitandvegetables.2.A:Ireallyneedto___________awaytoexercisemore.Icoulduseafitnessapp,butmyphone'sfull.B:Sodeleteafewfi