非谓语动词29. （2014江苏）The lecture _, a lively question-and-answer session followed.A. being given B. having given C. to be given D. having been given【答案】D31.(2012江苏)an important decision more on emotion than on reason, you will regret it sooner or later.A. BasedB. BasingC. BaseD. To base31. 【考点】非谓语动词动词现在分词做状语【答案】B【解析】动词base与逻辑主语you之间构成主谓关系，所以用现在分词作状语，故选B项。【举一反三】1）现在分词的主动语态：现在分词主动语态的一般式表示与谓语动词所表示的动作同时发生，完成式表示的动作在谓语动词所表示的动作之前发生，常作状语。如：They went to the park, singing and talking. 他们边唱边说向公园走去。Having done his homework, he played basketball.做完作业，他开始打篮球。2）现在分词的被动语态：一般式表示与谓语动词同时发生的被动的动作，完成式表示发生在谓语动词之前的被动的动作。The problem being discussed is very important.正在被讨论的问题很重要。Having been told many times, the naughty boy made the same mistake.被告诉了好几遍，这个淘气的孩子又犯了同一个错误。【试题延伸】(2011辽宁). _around the fire, the tourists danced with the local people.A. Gather B. To gather C. Gathering D. To be gathering点拨. C。题意：游客们围在火堆旁，与当地人一起跳舞。本题考查非谓语动词。句子主语the tourists是动词gather的执行者，二者是主动关系，故用现在分词作状语。【难度】较难31.(2011江苏)Recently a survey prices of the same goods in two different supermarkets has caused heated debate among citizens.A.compared B.comparing C.compares D.being compared答案B 解析：考查非谓语动词。首先分析句子结构，这句话的主语是a survey，谓语动词是has caused，宾语是heated debate，意思是“一项调查引起了城市人们里激烈的讨论”。由此可见，原句不缺主干成分，“ prices of the same goods in two different supermarkets”该部分是来修饰survey的，做后置定语。排除C选项，由于是主动地去比较，所以正确答案是B。