独立主格结构典型考题分请看题：All her time _______ experiments, she has no time for films.A. devoted to do B. devoted to doingC. devoting to doing D. is devoted to doing【陷阱】几个干扰项均有可能误选。【分析】此题最佳答案为B。现分析如下：(1) devote 意为“致力于，献身于”，主要用 devote…to…或be devoted to，其中的to 是介词，不是不定式符号，故后接动词时要用动名词，不用不定式。(2) 选A错误：若将 do 改为 doing 则可以。(3) 选B正确：all her time devoted to doing experiments为独立主格结构，用作状语。(4) 选C错误：因为all her time 与 devote 为被动关系，故应将devoting改为devoted。(5) 选D错误：若单独看 All her time is devoted to doing experiments，此句并没有错，但问题是逗号前后两个简单句没有必要的连接方式，所以从整体上看仍不对，假若在后一句的句首加上and或so，则可选D，或将D将中的is 改为 being也可选它。请做以下类似题（答案均选A）：(1) All the preparations for the project ______, we’re ready to start. A. completed B. have been completedC. had been completed D. been completed(2) Such _______ the case, I couldn’t help but______ him.A. being, support B. was, support C. has been, supporting D. is, to support比较以下各题，答案选B，因为句中使用了并列连词and：(1) All the preparations for the project ______, and we’re ready to start. A. completed B. have been completedC. had been completed D. been completed(2) Such _______ the case, I couldn’t help but______ him.A. being, support B. was, support C. has been, supporting D. is, to support

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