四川成考专升本英语不定式语法知识汇总

　　在四川成考专升本考试英语科目考试中，不定式是比较常考的考点。特别整理了有关的知识，供大家参考学习。

　　知识点：不定式作表语的情况

　　1、一种情况为主语是不定式(表示条件)，表语也是不定式(表示结果)

　　To see is to believe/To work means to earn a living.

　　2、另一种情况主语是以aim,duty,hope,idea,happiness,job,plan,problem,purpose,thing,wish等为中心的名词,或以what引导的名词性从句，不定式表语对主语起补充说明作用

　　His wish is to buy a luxurious car in the near future./The boss's plan is to start building the skycraper immediately./What I want to say is to get rid of the plan forever.

　　1)The most important[A]thing is negociate[B]with them about[C]the future of[D]the plant.

　　3、因为不定式所修饰的名词是不定式的宾语，所以如果不定式动词是不及物动词，那么就要在动词后加上相应的介词He has a lot of trifles to deal with./I had got no place to live in./That girl has nothing to worry about./the subject to concentrate on./He has a strict teacher to listen to./She has four children to look after./She had a sick mother to live with./This is the very person to sell your ticket to.

　　1)Although the lecture had already been on for five minutes,I still was not able to find a chair.

　　[A]to sit[B]for to sit on[C]to sit on[D]for sitting

　　4、一些表示企图、努力、倾向、目的、愿望、打算、能力、意向等意义的名词后面要求接不定式作其定语，如：ability,attempt,effort等

　　1)During[A]the 19th century scientists found[B]that when certain parts of the brain were damaged[C]men lost the ability doing[D]certain things.

　　2)What is new,however,is the scientific attempt whether other planets beyond our own have given birth to advanced civilizations.

　　[A]discover[B]discovers[C]discovering[D]to discover

　　3)Surely her daughter would make an even bigger effort her?

　　[A]please[B]pleased[C]to please[D]having pleased

　　知识点：不定式作状语的情况

　　注意作状语的动词不定式要与其逻辑主语在意义上和数上的一致。

　　1、表示目的

　　1)its plans to promote disarmaments,the party has decided to establish a campaign headquarters with Benjamin Seaman as its leader.

　　[A]Although

　　[B]To carry out

　　[C]Except that

　　[D]Make

　　2)pure lead,the lead ore is mined,then smelted,and finally refined.

　　[A]Obtaining

　　[B]Being obtained

　　[C]To obtain

　　[D]It is obtained

　　3)When they met,Leonardo and his enemy were fighting.

　　[A]killed each other

　　[B]killing each other

　　[C]to be killed each other

　　[D]to kill each other

　　表示原因

　　It's very kind of you to say so./I am pretty pleased to hear the news that you are elected as the president of the club./I'm sorry to interrupt you./They are quite surprised to see the great changes taking place in the area.

　　知识点：不定式作宾语的情况

　　不定式作宾语有两种：一种是及物动词后直接跟带to的不定式;另一种是“动词+疑问词+带to的不定式”

　　动词+带to的不定式结构

　　只能跟动词不定式的动词，常见的有：afford，agree，aim，appear，arrange，ask，believe，care，claim，decide，decline(拒绝)，demand，desire，determine，endeavor，expect，fail，hesitate，hope，intend，learn，long，manage，mean(想要)，offer(表示愿意做…)，pretend，promise，refuse，seek(试图)，swear，undertake，wish(想要)等。

　　例题

　　1、We refuse that there are insufficient funds in the great vaults(银行保管库)of this nation.

　　[A]to believe

　　[B]to be belived

　　[C]beliving

　　[D]have belived

　　2、The green turtle has been known over 2,000 miles to return to a nesting site.

　　[A]in the navigating

　　[B]the navigation

　　[C]to navigate

　　[D]navigation

　　3、The day is past when Chinese universities and colleges to give high school diplomas to all who sit through four years of instruction,regardless of whether any visible results can be discerned.

　　[A]afforded

　　[B]affording

　　[C]to afford

　　[D]can afford

　　从上例我们可以看出afford一般与can和can't或could和couldn't连用。