Unit 2 Discovering Useful Structures課件-高中英語人教版（2019）選擇性必修第三冊(cè)

Unit2Healthylifestyle

LearningAboutLanguage

Discoverusefulstructures

to-infinitiveasthesubject選擇性必修第三冊(cè)Leadin1Tochangebadhabits

isnevereasy.TheInfinitiveisthesubjectofthesentence!TheInfinitiveistherealsubjectofthesentence!

Ittookextratimetodothejobproperly.TojointhePeople’sLiberationArmy,itisrequiredformentoshaveofftheirbeards.Itwasnotpolitetodisturbyourneighborswithloudmusiclastnight.432Whatarethefunctionsofthecoloredpartsinthesentences?Findmoreinfinitivesinthereadingpassage.Topreventharmfulhabitslikethesefromdominatingateenager’slifeisessential.Itcanbeeasyforsomeofthemtoformbadhabits.Itisnoteasytobreakbadhabits.TheInfinitivesarethesubjectsofthesentences!Belowisablogentryabouteatingoutandeatingathome.Findthesentencesthatuseto-infinitivesassubjectsandfillinthetablebelow.

AExploringtherulesBelowisablogentryabouteatingoutandeatingathome.Findthesentencesthatuseto-infinitivesassubjectsandfillinthetablebelow.

To-infinitivesassubjectsToeatoutwasalsoasocialactivity,......,itwasnotthatdifficulttomakeasimpleandtastydish.AExploringtherulesWhentheto-infinitiveisusedasasubject,weusuallyusethepreparatorysubject

atthebeginningofthesentence.itAExploringtherulesBeSingularformInfinitiveasthesubjectofthesentence:

Example

1:Tohelpothersis

ourduty.SubjectPredicativeExample2:Togetgoodgraderequiresalotofhardwork.SubjectVerbSingularformObjectPart1GrammarInfinitiveastherealsubjectofthesentence:

Itis+adj.+(forsb)todo（describingsth.)

(adj:easy,difficult,comfortable,pleasant,light,heavy,dangerous，tiresome,interesting,fit)ItisimportantforeveryonetolearnEnglishwellinourrapidlydevelopingworld.Itis+adj.+(ofsb)todo(descrbingaperson)(adj:kind,good,nice,wise,unwise,clever,silly,stupid,foolish,careless,rude,polite,naughty)

Itisniceofyoutogivemesuchadvice.AExploringtherulesPart2GrammarItis+n.+todosth.(anhonour,ourduty,apity,ashame)Itisanhonourtobeinvitedtocontributetoyourmagazine.Ittakes/tooksbsometimetodosth.

Ittakesmequitealongtimetounderstandthemeaningofthepainting.AExploringtherulesPart2ExerciseItisimportanttoavoidpassivecigarettesmoking.important/avoid/passivecigarettesmokinguseful/turnto/fitnessconsultant/foradviceItwilltakeanutritionspecialistanhourtomakeabalanceddietmenuforyou.willtake/nutritionspecialist/abalanceddietmenu/make/anhour/foryou.Itisusefultoturntoafitnessconsultantforadvice.illegal/dangerous/take/drugsItisillegalanddangeroustotakedrugs.harmful/often/skip/breakfastItisharmfultooftenskipbreakfast.Jointhewordstomakefullsentencesusingtheinfinitive.Jointhesentencestomakeaparagraph.Youcanaddyourownsentencesifnecessarytomakeyourparagraphmoremeaningful.Tokeephealthyandgetridofbadhabits,sometimesitisalsoagoodideatogetprofessionalhelp.Anutritionspecialistwilltakeanhourtomakeabalanceddietmenuforyou.Itisalsousefultoturntoafitnessconsultantforadvice.Youcanalsohelpyourselfwithsomecommonsense.Forexample,itisharmfultoskipbreakfasttoooften.

Itisimportanttoavoidpassivecigarettesmoking.And,ofcourse,itisdangeroustotakeillegaldrugstoo.1A:Hello,doctor.Iwanttoloseweight,butIjustcan’tseemtodoit.Whatcanyoudotohelpme?B:Well,first,it’snecessaryto_____________whatyoueat.Cutoutallfattyfoodandsugarydrinks,andeatmorefruitandvegetables.2.A:Ireallyneedto_________awaytoexercisemore.Icoulduseafitnessapp,butmyphone’sfull.B:Sodeleteafewfiles.I’msuretheappdoesn’ttakeupmuchspace.3.A:Beforeexercising,alwaysdoafewwarm-upsto___________.B:Iknow.ButthenIalwaysfeeltootiredtocontinue!4.A:ShouldIgoforthepizzaorthefriedchicken?Ihate________________likethese.Youknowwhat-I’mgoingtoeatboth!B:Wow!Don’teattoomuchjunkfood-you’llgetfat.I’veactually_________________togoonadiet,soI’lljuststicktothefruitsalad.beginwith,beincontrolof,makeachoice,decideon,makeupone‘sminddecideonbeincontrolofmakingchoicesbeginwithmadeupmymindCompletetheconversationswiththecorrectformsofthephrasesinthebox.

Completethearticlewiththecorrectformsoftheverbsinthebrackets.LocatedtoseetoturntositpaintedrangingtoinvitetobeBApplyingtherulesImagineyourfriendhastakenyououttodinneratSkyBuffet.Writeathank-younotetoyourfriend,offeringtoreturnthefavourbyinvitinghimorhertoyourhomefordinnernextweekend.Remembertouseto-infinitives.Usetheexpressionsbelowtohelpyou.BApplyingtherulesIamwritingto…Ihavealwayswantedto…Itwassokindofyouto…Iwouldlike/loveto…Itwaswonderfulto…Mypl