3.邏輯錯誤.這種錯誤一般得根據(jù)上下文判斷得出,分析這么多年六級改錯的邏輯錯誤,答案無一例外都是將文中某個用錯的詞（很多情況下是一個形容詞）改成它的反義詞或添上一個否定詞,這里要求同學(xué)們掌握一些常用的否定詞綴,如in-,un-等等,因?yàn)橛械男稳菰~加上否定詞綴就變成了它的反義詞,舉例如下:
（1）the leaders of our country are unconsciously sending the message that reading may be connected to desirable activities that…（07年1月新六級改錯第七題）desirable>undesirable
（2）The task of learning facts and concepts, one at a time, makes learning laborious, boring and efficient.
（07年1月老六級改錯第八題）efficient> inefficient.本題中efficient和laborious與boring并列,根據(jù)并列成分意思一致原則,也可以推斷出這里的efficient應(yīng)該換成它的反義詞.
（3）But in the Information Age, no one can get by with knowing how to read well and understand increasingly complex material.（06年6月六級改錯第十題）with>without.這里句子主語用了no one表示否定,而整個句子表示肯定的意思,所以后面必然要用一個否定詞without與no one構(gòu)成雙重否定表示肯定。
（4）Initial impressions are vital, and a badly presented CV could mean acceptance, regardless of what's in it.（06年1月六級改錯第三題）acceptance>rejection
（5）the person who is unfamiliar with the arts, music,literature, philosophy, or history.（04年6月六級改錯第六題） unfamiliar>familiar
（6）Except for relatively-isolated trouble spots like present-day Somalia, and occasional years of good harvests, the world's food crisis has remained just around the corner.（04年1月六級改錯第四題）good>poor/bad
（7）Get someone to check for spelling and grammatic-al errors, because a spell-checker will pick up every mistake.（06年1月六級改錯第6題）根據(jù)上下文,這里應(yīng)該表示“不能挑出每個錯誤”，所以在pick up之前要加上否定詞not.
（1）the leaders of our country are unconsciously sending the message that reading may be connected to desirable activities that…（07年1月新六級改錯第七題）desirable>undesirable
（2）The task of learning facts and concepts, one at a time, makes learning laborious, boring and efficient.
（07年1月老六級改錯第八題）efficient> inefficient.本題中efficient和laborious與boring并列,根據(jù)并列成分意思一致原則,也可以推斷出這里的efficient應(yīng)該換成它的反義詞.
（3）But in the Information Age, no one can get by with knowing how to read well and understand increasingly complex material.（06年6月六級改錯第十題）with>without.這里句子主語用了no one表示否定,而整個句子表示肯定的意思,所以后面必然要用一個否定詞without與no one構(gòu)成雙重否定表示肯定。
（4）Initial impressions are vital, and a badly presented CV could mean acceptance, regardless of what's in it.（06年1月六級改錯第三題）acceptance>rejection
（5）the person who is unfamiliar with the arts, music,literature, philosophy, or history.（04年6月六級改錯第六題） unfamiliar>familiar
（6）Except for relatively-isolated trouble spots like present-day Somalia, and occasional years of good harvests, the world's food crisis has remained just around the corner.（04年1月六級改錯第四題）good>poor/bad
（7）Get someone to check for spelling and grammatic-al errors, because a spell-checker will pick up every mistake.（06年1月六級改錯第6題）根據(jù)上下文,這里應(yīng)該表示“不能挑出每個錯誤”，所以在pick up之前要加上否定詞not.