典型例題及解析

  [例1]—— Did that book give the information you needed？

  —— Yes，but______，we had to read it almost entirely.

  A.for finding it　B.to find it

  C.finding it　D.by finding it

  【解析】答案B。不定式「to find it」作目的狀語，「為了找到需要的信息，我們不得不把整本書讀一遍」。

  [例2]Charles Babbage is generally considered______the first computer.

  A.to invent　B.inventing

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  C.to have invented　D.having invented

  【解析】答案C。「通常人們認為是Charles Babbage發明了第一台計算機」，不定式「to have invited」作主語補足語。

  [例3]There isn’t any difference between the two.I really don’t know____.

  A.where to choose　B.which to choose

  C.to choose what　D.to choose which

  【解析】答案B。「這兩者沒有什麼區別，我真的不知道選擇哪一個」，不定式to choose作know的賓語。

  [例4]What the scientist said greatly encouraged us______the experiment again，but his secretary’s words discouraged us______the experiment any more.

  A.to try；to do　B.to try；from doing

  C.for trying；from doing　D.trying；to do

  【解析】答案B。「鼓勵某人做某事」，用encourage sb to do sth.所以，第一個空填to try；相反，「不鼓勵某人做某事」，用discourage sb from doing sth。

  [例5]She felt it a great shame______so severely in the presence of her boy friend.

  A.to criticize　B.to have criticized

  C.to be criticized　D.to have been criticized

  【解析】答案D。「她感覺在男朋友面前遭受如此嚴厲的批評真是一種恥辱」，不定式完成被動形式「to have been criticized」在此作賓語補足語。

  [例6]John was made______the truck for a week as a punishment.

  A.to wash　B.washing　C.wash　D.to be washing

  【解析】答案A。「他被懲罰洗卡車一周」，「to wash」作主語補足語，原本是「make sb do sth」句型，在這用被動語態，不定式需要加不定式符號「to」。

  [例7]Mr.Green has never smoked any more since his wife______him______.

  A.suggested；to give it up　B.persuaded；to give up it

  C.advised；to give it up　D.persuaded；to give it up

  【解析】答案D。「自從格林先生的妻子說服讓他戒菸後，格林先生再也沒有吸過煙」，「persuade sb to do sth」是固定表達「說服某人做某事」；suggest，advise 語意不符，況且suggest沒有這種用法。

  [例8]We all think it most foolish______this mistake.

  A.for you making　B.of you to make

  C.you to make　D.for you to make

  【解析】答案B。本題考查句型「It is+adj+of sb to do sth」意思為「某人做某事真是太……了」。本句話意思為：你犯這樣的錯誤真是太愚蠢了。

  [例9]Mrs.Smith warned her daughter______after drinking.

  A.never to drive　B.to never drive

  C.never driving　D.never drive

  【解析】答案A。固定表達「warn sb to do sth」意為「警告/提醒某人做某事」，其修飾詞never 應置於不定式符號to 之前。

  [例10]Because of air pollution being greatly reduced，this city is still______.

  A.a good place which to be lived in　B.a good place to live

  C.a good place to live in　D.a good place to live for

  【解析】答案C。動詞不定式作名詞的後置定語，同時介詞in不能省略。