文档介绍：托福阅读中的逻辑关系
逻辑关系(1):否定
明显的否定关系特色词汇
    --no, not, none, neither, never, deny等
隐含的否定关系特色词汇
    -- fail to, absence from, lack(of), refuse to,  little, few
I write to my parents every month.
I never fail to write to my parents every month.
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He is little known as an artist.
He is not a famous artist
否定前缀
英语否定的前缀主要有
a-[asexual 无性别的] 
ab-[abnormal非正常的]
anti-[antisocial 与社会对立的] 
counter-[counterrevolution 反革命] 
de-[decontrol解除管理, 解除管制]
dis- il- im- in- ir- mal- mis- non- un-...
 
In fact, he was so quiet that his parents thought he was not normal. 
In fact, he was so quiet that his parents thought he was abnormal.
否定后缀
需注意的三个否定后缀:
-less、-free、-proof
hatless: not wearing a hat
salt-free: without salt
a bulletproof car: a car designed not to be harmed by bullets
逻辑关系(2):因果--明显
because(of), since, for, as, due to, owing to, In that, so(that), therefore, thus, hence, as a result, consequently...
We didn't know what to do as we were just visiting there.
The delay is owing to the crowded traffic.
This book is different from that book in that this one is about chemistry and that one about history.
逻辑关系(2):因果--隐藏
1、表示“导致”的词
cause, lead to, make,render, stimulate, spur, spark, push, motivate, prompt, be responsible to
 
Too much work and too little rest often lead to illness.
Your action has rendered our contract invalid.
2、表示“由…而