,*,*,單擊此處編輯母版標(biāo)題樣式,單擊此處編輯母版文本樣式,第二級,第三級,第四級,第五級,一.,不定式,是,非謂語動詞,的一種，,是在句子中,不充當(dāng)謂語,的動詞。,非謂語動詞之動詞不定式,二.,動詞不定式的,基本形式,為：to+動詞,原形，有時(shí)可不帶to。不定式的否定形,式是,not to+動詞原形,。,三.,不定式在句子中,的,的,用法,(1),不定式,作名詞的用法。,在句子中可以充當(dāng),主語,、,表語,、,賓語,和,賓語補(bǔ)足語,。,不定式作主語,To grow,more trees here is very important.,=,It is,very important,to grow,more trees here.,）,To think,carefully before you act is,necessary.,It is,necessary for you,to think,carefully before you act.,）,不定式作主語，有一點(diǎn)應(yīng)注意,。,短語長，往后移，其位置，it,替,不定式作表語,Her dream is,to be,a lawyer.,What they want is,to do it,at once.,不定式作賓語,，,用在及物動詞之后。,常用,的,及物動詞,有：want,wish,hope,like,begin,start,help,agree,refuse,promise,learn,forget,know,need,try,等。,二巧記接不定式,作賓語,的,動詞,Hope,、,wish,、want,、,agree,、,promise,、,try,、,learn,、m,anage,、,learn,、,decide,、,Pretend,、,choose,三,個(gè),希望,、,兩,答應(yīng),;,設(shè)法,、,學(xué)會,”,做,決定,假裝,在,選擇,必背,：下列結(jié)構(gòu)必須使用,不帶to,的,動詞不定式。,had better do.,.,最好還是做,would you please do.,請您做,would rather d,o.,寧愿做,would sooner do.,愿做,may just as well do,.,還,是做,的,好,rather than do.,而不是做,不定式,作賓語補(bǔ)足語,。這類,動詞很多，例如：ask,want,believe,know,tell,advice,like,feel,help,force,invite,have,make,prefer,notice,order,remind,see,teach,think,expect,enable,cause,choose,allow,persuade,等。,1）,She adviced him,to do,so.,2）,The doctor told me,not to,go on with the work.,3）,He reminded me,to lock,the door when I,l,eft.,注意：1,、表示,感官,的動詞如,see,hear,watch,feel,notice,和某些,使役,動詞如,let,make,have,等，其后,作賓語補(bǔ)足語,的,不定式,通常不帶to,。,例如：,It made me feel thirsty.,2,、動詞,help,之后，不定式帶,to,或不帶,to,都可以。,Will you please help me(to)take this suitcase?,(2),不定式作,形容詞,的,用法,作定語,不定式,作定語修飾名詞,，要放在所修飾的名詞之后(,又稱后置定語,),。,這類名詞經(jīng)常使用,的,有,:,t,i,me,way,chance,right(,權(quán)力,),，,need(,需要,),，,decision(,決定,),，,opportunity(,機(jī)會,),effort(,努力,),courage(,勇氣,),，,struggle(,斗爭,),等。,例如：Mr.Wang is,a man to believe i,n.,I think he is,a man to depend on,.,(3),不定式作副詞,的,用法-,作狀語。,不定式可以在句子中作,目,的,、原因,和,結(jié)果狀語。,I am sorry to have bothered you.(,原因狀語,),They will come to the city to look for a job.,(,目,的,狀語),If you are so stupid as to do so,you must expect trouble.,（結(jié)果狀語）,4,.,動詞不定式與疑問詞,的,連用動詞不定式可以與疑問詞連用構(gòu)成不定式短語。,這些疑問詞有：,疑問代詞what,who,which,；,疑問副詞,how,when,where,why,等等。,不定式短語可以在句子中作,主語,、,賓語,、,表語,等成分。,(1),作主語,How to control the water pollution is a big problem.,如何控制水污染還是一個(gè)大問題。,(2),作賓語,Tell me why to be late again.,告訴我為什么又遲到了。,(3),作賓補(bǔ),Can you find out why to do it in this way?你能弄明白為什么要這樣做嗎?,