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摘要：考研英语中完形填空的失分率极高，通常一篇文章如果没有理清上下文的逻辑关系，可能会连续错好几道题甚至更多。不过，完形填空的上下文逻辑也并不是毫无规律可循，任何文章总是逃不过五种逻辑，掌握这五种逻辑关系，提高完形准确率！
►常见的五大逻辑关系
1、对立关系
包括让步和转折关系，常见的标志词和短语有：but，however，yet，on the contrary，by contrast，unfortunately，although，even though，nevertheless，in spite of，regardless of，anyhow，instead of，rather than，not…but等。
如2000年完型第41题：
He must store a large quantity of grain ___ consuming all his grain immediately.
[A]other than [B]as well as [C]instead of [D]more than
答案：C
解析：此处考查的是逻辑关系，需要根据空前和空后来判断。空前“储存了大量粮食”与空后“消耗所有粮食”形成对立关系，选C instead of.
2、因果关系
常用的标志词和短语有：because，for，since，as，thus，hence，therefore，so，so…that，such…that，in order that，consequently，accordingly，due to，thanks to，in response to，on account of，because of，considering that，seeing that，in that，now that，lest，as a result，for this reason等。
如2004年完型第34题：
More families consist of one parent households or two working parents， ___， children are likely to have less supervision at home.
[A]contrarily [B]consequently [C]similarly [D]simultaneously
答案：B
解析：此处考查的是逻辑关系，需要根据空前和空后来判断。空前“更多的家庭是单亲家庭或双工家庭”与空后“孩子在家很少受到监管”之间是因果关系，故所B consequently.
3、并列关系
常用的标志词和短语有：and，or，neither…nor，either…or，not only…but also，likewise，similarly，equally，in the same way，that is to say，as well as，same…as等。
如2004年完型第25题：
Theories focusing on the role of society suggest that children commit crimes in response to their failure to rise above their socioeconomic status， ___ as a rejection of middle-class values.
[A]or [B]but rather [C]but [D]or else
答案：A
解析：此处考查的是逻辑关系，需要根据空前和空后来判断。空前“没有成功提升社会经济地位”与空后“排斥中产阶级的价值观”都可能是“犯罪”的原因，故空前和空后之间是并列关系，选A or.
4、总分关系
常用的标志词和短语有：such as，for example，for instance， to illustrate，as an illustration，to take an example，more specifically等。
如2001年完型第31题：
The government is to ban payments to witnesses by newspapers seeking to buy up people involved in prominent cases ___ the trial of Rosemary West.
[A]as to [B]for instance [C]in particular [D]such as
答案：D
解析：此处考查的是逻辑关系，需要根据空前和空后来判断。空前“prominent cases”与空后“the trial of Rosemary West”是包含的关系，总体与部分的关系，可以选for instance和such as，但for instance后面不能直接加名词，such as后要直接加名词，故选D such as.
5、递进关系
常用的标志词和短语有：then，besides，additionally，in addition，furthermore，moreover，what is more等。
如1994年完型第46题：
Too often， careless use of words prevents a meeting of the minds of the speaker and listener. The words used by the speaker may stir up unfavorable reactions in the listener which interfere with his comprehension； hence， the transmission-reception system breaks down.（） inaccurate or indefinite words may make it difficult for the listener to understand the message which is being transmitted to him.
[A]Moreover [B]However [C]Preliminarily [D]Unexpectedly
答案：A
解析：此处考查的是逻辑关系，需要根据空前和空后来判断。此空位于段首，需要考虑本段与上一段的逻辑关系，上一段提到“careless use of words”给交谈带来的障碍，空后则提到“inaccurate or indefinite words”理解信息造成的困难。前后是递进关系，故选择A moreover.
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