同位语从句的结构
（一）由that引导·I have no doubtthat he will overcome all this difficulties.
他会克服一切困难，对此我并不感到怀疑。
【特别提示】：同位语从句引导词that不可省略。
（二）由whether引导
·The question whether we need more time to do the work has not been decided.
我们是否需要更多时间来做这项工作，这个问题还未决定。
（三）由其他词引导的同位语从句
·I have not made up my mind what elective subjects I am to take next term.
我还没有决定好下学期上哪些选修课。
·When you are about halfway through the story, try to make a guess how the plot will develop.
当你把故事读到一半时，猜测一下情节将如何发展。
·I have no idea when I will be back from Shanghai.
我不知道我什么时候从上海回来。
（四）同位语从句与被修饰名词的分割
有时，为了保持句式的平衡，将同谓语从句与被修饰的名词分割，其间出现其他成分。
·Concernswere raised that witnesses might be encouraged to exaggerate their stories in court to ensure guilty verdicts.
人们日益担心，证人可能会因此而受到鼓励，在法庭上夸大事实以保证陪审团对被告做出有罪的判决。（这里先行词concerns与that同位语从句被谓语were raised隔开。）
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