人教版(2023)选择性必修第三册 Unit 2 Healthy Lifestyle Gramma.pdfVIP

人教版（2023）选择性必修第三册Unit2

HealthyLifestyleGrammar—Infinitives(3)as

thesubject课件（20张PPT）

(共20张PPT)

Unit2healthylifestyle

Grammar—Infinitives(3)

asthesubject

课堂目标

不定式作主语的魅力

Itiswiseofyoutodevotemoneyandtimetokeepingyouhealthyandfit.

Togojoggingisamongthebestformsofexercise.

语法导入

1.Lookatthefollowingsentencesandpayattentiontotheitalicized

infinitives.Findmoreinfinitivesinthereadingpassage,andtelltheir

meaningsandfunctions.

（1）Tochangebadhabitsisnevereasy.

（2）Ittookthesurgeonthreehourstofinishmymother’slingsurgery.

（3）Tojointhepeople’sLiberationArmy,itisrequiredformentoshave

offtheirbeards.

（4）Itwasnotpolitetodisturbyourneighborswithloudmusiclast

第1页共7页

night.

Moreinfinitivesinthereadingpassage

（1）….itcanbeeasyforsomeofthemtoformbadhabits.

（2）Afterall,itisnoteasytobreakbadhabits.

动词不定式在句中作主语，为了保持句子的平衡，避免头重脚轻，常

用it作形式主语，而真正的主语不定式放在句子的末尾。比如上页中

的第2；3；4例句。

（1）important/avoid/passivecigarettesmoking

Itisimportanttoavoidpassivecigarettesmoking.

（2）willtake/nutritionspecialist/abalanceddietmenu/make/an

hour/foryou

Itwilltakeanhourforanutritionspecialisttomakea

balanceddietmenuforyou.

2.Jointhewordstomakefullsentencesusinginfinitives.

（3）useful/turnto/fitnessconsultant/foradvice

Itisusefultoturntoafitnessconsultantforadvice.

（4）illegal/dangerous/take/drugs

Itisdangeroustotakeillegaldrugs.

（5）harmful/skipbreakfast/often

Itisharmfultoskipbreakfastoften.

2.Jointhewordstomakefullsentencesusingtheinfinitive.

3.Completetheconversationswiththecorrectformsofthephrasesin

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thebox.

（1）A:Hello,doctor.Iwanttoloseweight,butIjustcantseemtodoit.

Whatcanyoudot