考研英語長難句是怎么樣的呢?考生們應該如何處理這個問題呢?下面是小編為大家整理收集的關于2017考研英語長難句把握五個拆分信號的相關內容，希望對大家有所幫助。
1、標點符號：
比如，2個逗號形成插入語，破折號表示解釋說明，分號相當于“and”表示并列;
2、連詞：
并列句的并列連詞and、or、but、yet、for等，從句的從屬連詞which、that、when、how、if等;
3、介詞：
介詞引導介詞短語，介詞短語在句子中可充當定語、狀語等修飾成分;
4、不定式符號to：
不定式符號to引導不定式短語，在句子中除了可以充當主語、賓語、表語、補語等主干成分外，還可做定語、狀語等修飾成分;
5、分詞：
分詞包括現在分詞和過去分詞，在句子中可充當定語和狀語修飾成分。
下面我們就按照長難句拆分原則，依照這些拆分信號，結合考研英語閱讀或翻譯真題中的長難句進行實戰演練一下吧!
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
拆分點：從屬連詞、介詞、標點符號
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)句子結構
找謂語動詞(began, came, wants, cannot be foreseen);
↓
找連詞(when, that, that)
↓
前面沒有從屬連詞的動詞即為主句的謂語動詞
↓
確定主從句
主句：This trend began during the Second World War ;
從句：定語從句when several governments came to the conclusion修飾the Second World War，本從句嵌套著一個二級從句即同位語從句that the specific demands cannot generally be foreseen in detail修飾conclusion和一個三級從句that引導的定語從句that a government wants to make of its scientific establishment修飾demands。
(3)解析
during the Second World War介詞短語做狀語;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 做定語修飾the Second World War ;that the specific demands cannot generally be foreseen in detail同位語從句修飾conclusion ;that a government wants to make of its scientific establishment修飾demands。
(4)本句的參考譯文
這種趨勢始于第二次世界大戰期間，當時一些國家的政府得出結論：政府向科研機構提出的要求通常是無法詳盡預見的。
總之，只要考生對句子結構有個透徹的理解，弄清句子的各個成分，并可以借助連詞、介詞、非謂語動詞等手段把句子由簡單變得復雜，由復雜變得簡單，這樣句子結構分析技能提高了，長難句也就攻克了，對于考研閱讀和翻譯的理解也就簡單了。