3. ________ in thought, he almost ran into the car in front of him. (全国卷)

A. Losing B. Having lost

C. Lost D. To lost

【分析】答案选C。表示原因不能用不定式，排除D;句子主语he与lose是逻辑上是被动关系，用过去分词: Lost in thought…=As he was lost in thought… 此处的过去分词实际上是表示状态的形容词，用汉语思维难于理解，除be lost in thought(沉思)外，这类惯用结构还有be caught in the rain(遇到雨), be dressed in red(穿着红衣), be seated in a chair(坐在椅子上)等，并注意这类结构作补语或后置定语时也要用过去分词。

4. ________ his telephone number, she had some difficulty getting in touch with Bill. (上海卷)

A. Not knowing B. Knowing not

C. Not having known D. Having not known

【分析】答案选A。现在分词的否定式在前面加not，“不知道电话号码”与“难与Bill联系”同时发生的不用完成式。Not knowing…=As she didn’t know…

【总结】2013年威廉希尔app 为小编在此为您收集了此文章“高考专家盘点英语语法要点：不定式和分词表原因的区别”，今后还会发布更多更好的文章希望对大家有所帮助，祝您在威廉希尔app 学习愉快!

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