“全国医学博士外语考试：长难句拆分方法”相信是备考全国医学博士外语水平考试的朋友比较关心的事情，为帮助学员朋友们理解，医学教育网整理内容如下，希望可以帮助到您！

1、标点符号：

比如，2个逗号形成插入语，破折号表示解释说明，分号相当于“and”表示并列；

2、连词：

并列句的并列连词and、or、but、yet、for等，从句的从属连词which、that、when、how、if等；

3、介词：

介词引导介词短语，介词短语在句子中可充当定语、状语等修饰成分；

4、不定式符号to：

不定式符号to引导不定式短语，在句子中除了可以充当主语、宾语、表语、补语等主干成分外，还可做定语、状语等修饰成分；

5、分词：

分词包括现在分词和过去分词，在句子中可充当定语和状语修饰成分。

下面我们就按照长难句拆分原则，依照这些拆分信号，结合考博英语阅读或翻译中的长难句进行实战演练一下吧！

1、This trend began during the Second World War，when several governments came to the conclusion that the specific demands that a government wants to make of its scientific establishment cannot generally be foreseen in detail.

（1）句子拆分

拆分点：从属连词、介词、标点符号

This trend began∥during the Second World War，∥when several governments came to the conclusion∥that the specific demands∥that a government wants to make of its scientific establishment cannot generally be foreseen∥in detail.

（2）句子结构

找谓语动词（began，came，wants，cannot be foreseen）；

↓

找连词（when，that，that）

↓

前面没有从属连词的动词即为主句的谓语动词

↓

确定主从句

主句：This trend began during the Second World War；

从句：定语从句when several governments came to the conclusion修饰the Second World War，本从句嵌套着一个二级从句即同位语从句that the specific demands cannot generally be foreseen in detail修饰conclusion和一个三级从句that引导的定语从句that a government wants to make of its scientific establishment修饰demands.

（3）解析

during the Second World War介词短语做状语；when several governments came to the conclusion that the specific demands that a government wants to make of its scientific establishment cannot generally be foreseen in detail做定语修饰the Second World War；that the specific demands cannot generally be foreseen in detail同位语从句修饰conclusion；that a government wants to make of its scientific establishment修饰demands.

（4）本句的参考译文

这种趋势始于第二次世界大战期间，当时一些国家的政府得出结论：政府向科研机构提出的要求通常是无法详尽预见的。

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