题目内容
14.Having been shown (show) several times,he still doesn't know how to do it properly.分析 已向他展示了好多次,但他仍然不知道怎样恰当地做这件事.
解答 答案是Having been shown.
本题考查非谓语动词的用法.题干中逗号后面是完整的句子,逗号前后两部分没有连词或引导从句的引导词,故判断逗号前不是句子,show需要用分词做时间状语;show和句子主语之间是被动关系,并且强调分词show的动作在谓语动词之前已经发生,所以选用现在分词完成式的被动语态,故答案是Having been shown.
点评 本题是要求用所给词的适当形式填空,解题时首先考虑句中需要的词性;其次,如果是谓语动词关注时态、语态和数的变化;如果是非谓语动词要联系非谓语的基本用法判断非谓语的形式;如果是名词关注单复数.
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