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。
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。
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。
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。
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。
(4) 独立成分
有些非谓语动词的使用不受与主语关系的限制，称为独立成分，这类成 分只记忆即可。如：
generally speaking， judging from……， to tell the truth……， 等。
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（责任编辑：zjc）