54. Silver is the best conductor of electricity, copper _B_ it closely.
A followed B following C to follow D being followed
49. All things _A_, the planned trip will have to be called off.
A considered B be considered C considering D having considered
call off 取消; cancel vt. 取消; 四级中的考点就是现在分词和过去分词的区别。
独立主格的结构2:with + 名词+ 分词
36. After the Arab states won independence, great emphasis was laid on expanding education, with girls as well as boys _C_ to go to school.
A to be encouraged B been encouraged C being encouraged D be encouraged
as well as 和; be encouraged不会考。
动词不定式有预示将来行为的含义。to be encouraged 将要被鼓励;
been encouraged 已经被鼓励完了,与主句的谓语动词相对;being encouraged 正在被鼓励
2.短语部分没有独立主语,则短语结构称为非谓语动词。
非谓语动词的结构:分词
句子的主语决定非谓语动词中的分词是用主动还是被动形式。如果是句子的主语发出动作,则使用现在分词;如果动作不是由句子的主语发出,则使用过去分词。
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