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2017年成考专升本《医学综合》生理知识

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  2017年成考专升本《英语》动词不定式归纳【一】1

  【导语】辛勤耕耘知识地,寒窗苦读数十年。今朝征战上考场,自信饱满书人生。奋笔疾书智慧语,锦绣文章佳偶成。金榜题名必然事,鱼跃龙门花盛放。努力备考,考到理想院校!以下是

  动词不定式的用法

  不定式结构作主语

  1、不定式前置

  1) Derive [A] mineral resources from [B] sedimentary rock [C] is a [D] major modern industrial activity.

  2) in the matriculation for postgraduate in a short time is realy a hard nut.

  [A] To make high scores[B] To make low goal[C] To the high scores[D] Make the low goals

  2、上述形式一般情况不多见,作为考试的规范英语,如果不定式较长,显得头重脚轻,则可由代词“it”作形式主语(形式主语“it”不能由“that”或“this”等其他代词代替),而将不定式放到后面

  It is really a hard nut to get high scores in the matriculation for postgraduate in a short time.

  3) John admitted that it's always difficult.

  [A] for him being on time[B] being on time for him

  [C] for him to be on time[D] on time for him

  4) It is difficult for me [A] to be concentrating [B] while someone [C] is using [D] a vacuum cleaner.

  3、不定式后置的情况不仅限于动词是系动词,也适用于其他动词

  It took us a great deal of efforts to finish that task.

  It made him extremely happy to get contact with his family in Taiwan since they separated more than 40 years ago.

  4、不定式结构所表示的动作是谁做的,即不定式的逻辑主语,通常可以在特定的上下文中能看出,也可以通过带“for +名词短语”辨出

  It is quite important for us to read good books during the period of general review(总复习)。

  It is not difficult for those who study maths well to pass the exam.

  5、在某些形容词(如careless,clever,considerate,foolish,good,impolite,kind,naughty,nice,silly,stupid等)作表语时,不定式后可以加of来引导出其逻辑主语

  It is very kind of you to help me./It is stupid of him to do such a silly thing.

  间或也可用for + there to be 表示(而且there后面的不定式只能是to be)。

  It's a great pity for there to be much trouble in the company.

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