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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,1.No,is permitted here(smoke).,It is not very good for you,so much(smoke).,2.,more is necessary(read).,It is quite necessary,it again(read).,3.,a language in one month is impossible.(learn),一般来说，表示比较,抽象的行为动作,时多用,doing,；,表示比较,具体的某次行为动作,时多用不定式,to do,。,一般来说，表示比较抽象的行为动作时多用doing；,1,1.,(climb)mountains is interesting,1,(drive)a car during the rush hour must be tiring,2._computers is my job.,A.To sell B.Sell C.Selling D.Sold,3.,(teach)English is my job.,1,(teach)you English this term is my job.,doing,作主语时，通常用以表示一件,已知的事,或,经验,。,to do,通常用来表示一件,未完成的事或目的,。,doing,作主语时强调的是做那件事的,持续状态,，,to do,作主语时主要表示,现在或者将来的事情,1.(climb)mo,2,1.,学一门外语非常重要。,2.,覆水难收。,3.,放弃这一机会是个遗憾。,4.,撒谎没好处。,5.,与其诅咒黑暗，不如燃起蜡烛。,It is very important to learn a foreign language.,It is useless crying over the spilt milk.,It seemed a pity to give up the chance.,It is no good telling lies.,It would be better to light up candle than to curse the darkness.,1.学一门外语非常重要。It is very import,3,It+be+,形容词,/,名词词组,+to do sth./doing/that.,不定式,to do,作主语时，常使用形式主语结构；而,doing,作主语时，较少用形式主语结构，,只有在,It is+no use,no good(fun,a great pleasure,a waste of time.),等名词,+doing sth.,It is+useless(senseless,nice,worth,等形容词,)+doing sth,It+be+形容词/名词词组+to do sth,4,It is hard,to make,him change him mind.,It is no good,objecting,.,It is useless,speaking,.,It is not an easy thing,to master,a language.,It is a great fun,playing,football,How would it be,to start,tomorrow?,It is a waste of time,trying,to explain,It took all his strength,to move,out of the crowds.,It is nice,seeing,you again,Business is business and it will not do,to be,so careless.,It is no good,pretending,to know what you dont know.,It is worth,learning,another language.,It is hard to make him change,5,逻辑主语,for the young,the children,It is useless crying over the spilt milk.,It seemed a pity to give up the chance.,It is no good telling lies.,Its very kind to help me with the work.,It seemed selfish not to share his dictionary with others.,逻辑主语 It is useless crying over,6,It+be+,形容词,+,（,for sb.,）,+,动词不定式,这类句型常用形容词,easy,difficult,hard,important,possible,，,wise,等作表语，为了强调不定式的逻辑主语，,常在不定式前加,for sb,，译为“对某人来说做某事怎么样”,It+be+,形容词,+of sb.+,动词不定式,这类形容词常是表示,心理品质,性格特征的形容词,，如：,kind,nice stupid,clever,foolish,polite,impolite,silly,selfish,considerate,等。某人和这些形容词可以构成主系表结构。,It+be+形容词+（for sb.）+,7,如：,Its very kind of you to help me with the work.,=You are kind to help me.,It seemed selfish of him not to share his dictionary with others.,=He seemed selfish not to share his dictionary with others.,如：,8,1.,我花了一些时间才读完那段阅读材料。,2.,至少要九个钟头才能到那儿。,3.,跟着理智走，要有勇气，跟着感觉走，要有倾其所有的决心。,It took me some time to read the reading materials.,It takes at least nine hours to get there.,It takes courage to follow your mind.But it takes everything to follow your heart.,1.我花了一些时间才读完那段阅读材料。It took me,9,It took me some time to read the reading materials.,It takes at least nine hours to get there.,It takes courage to follow your mind.But it takes everything to follow your heart.,It+takes+(sb.)+some time+to do sth.,表示“（某人）花多少时间干某事”的句型，其中,it,是形式主语，代替后面的不定式（,to do sth.,），句型中的,sb.,也可以省略。,It took me some time to read t,10,在,there is no.,句型中的主语只能用,doing,，并且不能带逻辑主语。如：,There is no denying the fact.,Well,you have said it and there is no taking it back.,上述句子的意思如用不定式,to do,则分别为：,It is impossible to deny the fact.,Well,you have said it and it is impossible for you to take it back.,在 there is no.句型中的主语只能用doi,11,1._well in an interview is an important part of getting a place at university.,A,To do B,Doing,C,Done D,Being done,2.It is my honor _ here to spend some time with you.,A,to be invited B,inviting,C,being invited D,to invite,BA,1._well in an intervie,12,3.Is,necessary to take off our shoes when we enter the lab?,A.everyone B.this,C.her D.it,4._ will take you a lot of time to find him in the crowd.,A.It B.I C.We D.They,5.It is no use his _ there,the situation is hopeless now.,to go B.to be going,C.going D.having gone,3.Is necessary to,13,谢谢！,14,谢谢！14,15,15,
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