题目内容
17.Everyone knows that _____ is dangerous to play with fire,but _____ is difficult is to prevent children from playing with fire.( )A. | it,it | B. | what,what | C. | it,what | D. | what,it |
分析 每个人都知道玩火是危险的,但最困难的是防止孩子玩火..
解答 答案是C.考查名词性从句,分析句子结构可见并列词but前的部分是一个宾语从句,在这个宾语从句中考查it做形式主语,真正的主语是to play with fire;后部分是一个主语从句"_____ is difficult",主语从句中缺少主语,所以用what来引导,what做从句的主语,故答案选C.
点评 名词性从句一直是高考考查的热点,近几年的高考题主要考察在具体语境中对what和that的辨析,此外,也要求学生对定语从句和名词性从句有清晰的辨认. 首先我们要判断它是哪个名词性从句.名词性从句是主句的一部分,可以充当主语、宾语、表语、同位语.就是说,如果我们能判断出某个从句是某个主句的主语、宾语、表语或同位语,那么就找到了解题的路子.名词性从句的解题可以从分析从句的句子结构开始,看从句是否缺少主语、宾语、表语、定语等句子成分.然后具体问题具体分析.
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