题目内容
6.Read the instructions before ______ the new machine( )A. | use | B. | to use | C. | using | D. | used |
分析 请在使用新机器前阅读使用说明.
解答 答案B 动词不定式作宾语的时候主要是动词后面;动名词可以作介词宾语;过去分词不能作宾语.根据介词before,可知后面要用动名词.故选B.
点评 首先要掌握非谓语动词的基本用法,特别是不定式,动词ing,过去分词的各种句法功能.
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