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1、Unit1Gettingalongwithothers课件7不定式是历次历年高考必考的内容。不定式在句子中可做主语、宾语、表语、定语、状语和宾语补语。1)不定式做主语一般表示具体的某次动作。当主语较长，谓语较短时，常用it做形式主语，而将不定式放到谓语的后面。It is important for modern young people to master at least two foreign languages.It做形式主语，不定式放在谓语动词之后常用于下列结构中：a) It is＋形容词(easy, import
2、ant, difficult, foolish, inconvenient, unnecessary, right, wrong...)＋( for/of sb.)＋不定式b) It is＋名词＋不定式(a pleasure, a pity, a pleasant thing, one‘s duty, an honor, a shame, a crime, no easy job.It is essential to reserve a table in advance of Christmas Eve.It is not
3、 easy to catch fish with your hands only.It is important for us young people to learn English and master it.c) It takes (sb.) some time (hours, months, days, a lot of time, patience...)＋不定式It takes me three hours to learn English each day.It took them half the nig
4、ht to get home in the snow.2)不定式作表语不定式作表语常表示将来的动作，主语常常是表示意向、打算、计划的词，如wish, idea, task, purpose, duty, job等。The most important thing for one's health is to have plenty of exercise.My chief purpose has been to point out the difficulties of the matter.3)不定式作宾语不定式常在下列
5、动词后面作宾语：afford,agree,apply,arrange,ask,attempt,beg,begin,care,choose,claim,,demand,decide,desire,determine,expect,fail,hope,hesitate,hate,intend,learn,like,manage,mean,offer,plan,prepare pretend,promise,refuse,,seek,tend,threaten,want等。不定式作宾语还常用在下面结构中；主语＋动词＋it＋形容词
6、＋不定式。We found it impossible to get everything ready in time. I think it important to learn English well in college.使用这种句型的常见动词有：believe, consider, declare, feel, find, guess, imagine, prove, realize, suppose, think,等。4)“whword＋不定式”结构不定式前加一个疑问代词(what, which, who,
7、whom, whose)或疑问副词(where, when, how, why)，以及连词whether构成特殊的不定式短语，其作用相当于一个从句，这样的不定式短语常在某些动词后面作宾语。常见的可以接这种不定式短语的动词有：know, see, decide, tell,ask,consider,discover,explain,findout,forget,guess,hear,imagine,inquire,learn,observe,perceive,remember,think,understand,wonder等
8、。5)不定式作状语a)不定式作状语表示目的。或用于so as和in order之后，来强调这种目的。e.gTo learn a foreign language well, you must make painstaking efforts.b)不定式表示结果，特别是在so...as to, such.
