同学们只要掌握非谓语动词做定语的一般的规律,就可以判断①题答案为C，②题答案为D。

    (2)对固定结构的考查，如：

    ① The professor could hardly find sufficient grounds _____ his
arguments in favor of the new theory.(2000.6)

       A. to be based on           B. to base on

       C. which to base on         D. on which to base

    ② The pressure _____ causes Americans to be energetic, but it
also puts them under a constant emotional strain.

       A. to compete              B. competing

       C. to be competed          D. having competed

    ①题为不定式做定语的固定形式，答案为D，②题为某些特定名词的定语结构，答案为A。在英语中有些名词，如动词变来的名词，形容词变来的名词，以及means,
way, time, moment, reason等要求其后用不定式做定语，不定式没有体的变化。

    4) 做状语的非谓语动词的选择

    做状语的非谓语动词主要考查其各种形式的选择，如：

    ① ______ the earth to be flat, many feared that Columbus would fall off the edge of the earth.(1996.6)

       A. Having believed 　   　B. Believing 　　

       C. Believed 　          　D. Being Believed

    ② _______ a teacher in a university, it is necessary to have at
least a master’s degree.(1995.1)

       A. To become 　　        B. Become 　　

       C. One becomes 　　      D. On becoming

    ③ Realizing that he hadn’t enough money and ____ to borrow from his father, he decided to sell his watch.(1995.1)

       A. not wanted 　       　B. no to want 　　

       C. not wanting　　       D. wanting not

    ④ ___ it or not, his discovery has created a stir in scientific
circles.(1997.1)

       A. Believe 　          　B. To believe 　　

       C. Believing 　　        D. Believed

    从以上各题来看，考查的侧重点有：

    (1)状语类别的判断

    不同的状语对非谓语动词的要求不同，目的状语要求用不定式，如②。

    (2)非谓语动词与句子属于之间的逻辑关系

 　　根据主谓关系或动宾关系的不同来确定用现在分词还是用过去分词。

    (3)非谓语动词的否定形式

  　not否定非谓语动词时置于非谓语动词之前，如③。