Unit1LifeChoicesLesson1LifestylesGrammar课件高一英语北师版

Unit1Lesson1LifestylesGrammar新课导入Whatdoyourememberaboutthem?1.AccordingtoJoe,whatisimportant?2.Whatdoesheneedtodo?Itisimportanttomeetfriendsinpersonfromtimetotime,notjustonsocialmedia.Heneedstodraghimselfawayfromtheonlineworldsometimes.课堂学习Studythesesentences.Itisimportanttomeetfriendsinpersonfromtimetotime,notjustonsocialmedia.Ineedtodragmyselfawayfromtheonlineworldsometimes.infinitive不定式subject主语object宾语91.Mymumkeepstellingmetogooutwithmyschoolfriendsinstead.2.It’simportanttomeetfriendsinpersonfromtimetotime.3.WhenIsetouttodosomething,Idomybesttoachieveit.4.Mytargetistopreparemyselfformydegreeinbiologyatuniversity.5.LiYingisthefirstpersontojointhevolunteeringclubinherclass.predicative表语attributive定语adverbial状语subject主语object宾语动词不定式

不定式的构成1.定义

动词不定式是非谓语动词的一种，由不定式to+do构成。没有人称和数的变化，在句子中不能作谓语，但可做主语、表语、宾语、状语和宾语补足语，具有名词、形容词和副词的特征。

动词不定式仍保留动词的一些特点。Grammar2.形式时态主动被动一般式todotobedone完成式tohavedonetohavebeendone进行式tobedoing完成进行式tohavebeendoing否定式：否定词（not/never）+动词不定式

不定式的作用1.作主语不定式作主语时，谓语用单数。往往用it作形式主语，把不定式放在谓语后面。Eg:Ittookustwohourstofinishthejob.

2.作宾语①

动词+不定式

Eg:Hemanagedtoescapefromthefire.②

动词+疑问词+to，“特殊疑问句+不定式”相当于名词，作宾语。Eg:Idon'tknowwhattodonext/howtodoitnext.[名师点津]不定式短语作宾语时，如果还带有宾语补足语，往往把不定式短语放在宾语补足语之后，用it作形式宾语。Eg:Ifinditnecessarytolearnaforeignlanguage.3.作宾语补足语①

动词+宾语+不定式（todo）Eg:Hewarnedmetobecareful.[名师点津]可以用动词不定式作宾补的动词有：ask,tell,order,want,get,wouldlike,like,advise,invite,allow,help,wish,warn,expect,wouldprefer,encourage.②

表见解、看法的动词结构可为：动词+宾语+tobe的不定式结构。Eg:WeconsiderTomtobeoneofthebeststudentsinourclass.

Thebookisbelievedtobeuseful.（被动语态）③

There+不定式Eg:Wedidn'texpecttheretobesomanypeoplethere.④

在动词feel(一感),hear,listento(二听),have,let,make(三让),notice,see,watch,observe,lookat(五看)（即：吾看三室两厅一感觉）等后面的补足语中，不定式不带to，但变为被动语态后，必须带to。Eg:Theysawtheboyfalloffthetree.⑤

help后面作宾语补足语的不定式可以带to，也可以不带to。Eg:Ioftenhelphim(to)cleantheroom.

Ihelpedhim(to)findhisthings.4.作定语不定式作定语，修饰名词或代词，不定式和它所修饰的名词之间有逻辑上的主谓关系、动状关系、同位关系或动宾关系。不定式通常要放在这些被修饰的词后。Eg:Ihavealotofworktodo.（动宾关系）

Heislookingforaroomtolivein.（动状关系）

Heisthefirstpersontothinkoftheidea.（主谓关系）

Hehasgotachancetogoabroad.（同位关系）[名师点津](1)不定式的逻辑主语是句子的主语时，不定式用主动形式表被动。Eg:Doyouhaveanythingelsetosay?(2)如果作定语的不定式是一个短语，则要保留不定式短语中的副词或介词。Eg:Ineedapentowritewith.（willwritewiththepen.）

Ihavealittlebabytolookafter.（Imustlookafterthelittlebaby.）5.作状语作状语，表示目的、结果、原因等，有时还有一些固定搭配的不定式短语，如inorderto,soasto,so...asto,such...asto,enoughto,too...to等。①

作目的状语，justto,onlyto（仅仅为了）,inorderto,soasto,so/such...asto...（如此……以便……）Eg:Heransofastastocatchthefirstbus.②

作结果状语，表事先没有预料到的，要放在句子后面。Eg:Hehurriedtothepostofficeonlytofinditwasclosed.③作原因状语Eg:Wewereveryexcitedtohearthenews.④作条件状语Eg:Toturntotheleft,youcouldfindapostoffice.6.作表语不定式可放在be动词后面，构成表语。Eg:Thequestionishowtoputitintopractice.[名师点津](1)不定式在句中作表语时，对应的谓语动词用单数。(2)当主语是不定式时，表语不能用v.-ing形式，可用不定式。Eg:Toseeistobelieve.（眼见为实）（Seeingisbelieving.）10Completetheblogentrywiththecorrectformofthewordsinthebrackets.Iwakeupatsixo’clockeverymorning.It_______(take)melessthan15minutes_________(wash),getchanged,havebreakfastandleavehome.I’malwaysthefirstperson_______(get)tomyclass.Themorningsarealwaysverybusyandtheafternoonsareevenbusier!Byaroundfiveo’clock,Iusually_______(find)time_______(do)mypaperworkandpreviewthelessons.Youmaythinkthatit_______(be)boring________(do)thesamethingeveryday,butIlikebeingbusy.

(WangQing,16yearsold)takestowashtogetfindtodoistodoExpressyourself11PairworkDiscussyourideallifestylewithapartner.Whatisyourideallifestyle?Comparedwithyourcurrentlifestyle,howisitdifferent?Myideallifestyle•