________ many times，I still didn"t know how to operate the machine.A．Having taug
题型：不详难度：来源：
________ many times，I still didn"t know how to operate the machine.| A．Having taught | B．Having been taught | C．Being taught | D．Teaching |
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答案
| B |
解析
试题分析：考查分词做状语。本句中的动词teach与句子主语I构成被动关系，可以使用过去分词done表示被动和已经完成；过去分词done="having" been done；后者强调的是已经完成，前者强调的是被动。教育：已经被多次教育，我仍然不知道如何操作这部机器。故B正确。
点评：当分词做状语的时候，如果构成分词的动词与句子的主语构成主动关系，就使用现在分词做状语；当二者构成被动关系，使用过去分词做状语。如果分词的动作发生在谓语动词之前，就使用分词的完成式。如果分词与句子的主语没有关系，可以使用状语从句或者独立主格结构。 |
举一反三
-----What do you think of the book I lent to you yesterday ?
------Oh, not too bad.It’s not too difficult_______.
A reading B.to be read C.to read D.being read |
_______to sunlight for too much time will do harm to one’s skin.| A．Being exposed | B．Having exposed | C．Exposed | D．After being exposed |
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The oceans and seas ______ the islands are more or less polluted.| A．surrounding | B．surrounded | C．are surrounded by | D．are surrounding |
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Apple has given in to intense pressure from Chinese state media about its customer service practices, ________ to consumers in its second-largest market.| A．apologizing | B．apologize | C．having apologized | D．to apologize |
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________to work overtime that evening, I missed a wonderful film.| A．Having been asked | B．To ask | C．Having asked | D．To be asked |
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