托福阅读10种题型举例分析——推断题
托福阅读大家都想能更好地把题目做对，不过托福阅读题型还是很多的，不同的托福阅读题也有着不同的解决办法，具体该如何做呢?下面介绍的就是一种很常见的题目：推理题，希望能给大家一些好的建议。
托福阅读10种题型举例分析——推断题
无论是OG还是Delta，都把阅读的题目分成十类，即：Understanding Facts and Details, Identifying Negative Facts, Locating Referents, Understanding Vocabulary in Context, Making Inferences, Determining Purposes, Recognizing Paraphrases (Simplifying sentences), Recognizing Coherence (Sentence inserting), Summarizing Important Ideas and Organizing information.
还有很重要的一点，做题的时候，无论考试还是练习，不光要分析对的选项为什么对，更要分析错的选项为什么错。有时候分析错误的原因更为重要。有助于你把握出题的思路，培养感觉。这是非常有用的。
五、推断题
应该说推断题属于难度比较大，混淆选项比较难排除的一种。但如果掌握一定的技巧也不是无章可循。OG的说明是：如果文章提到结果，很可能让你推断原因;如果提到二者比较，很可能问你比较的基础;正确答案不是文章明显提到的，而是明显可以推出来的。最重要的一句话就是：You should be able to defend your choice by pointing to explicitly stated information in the passage that leads to the inference you have selected。正确的答案一定要有原文某句话作支持。这为排除法提供了良好依据。因为错误选项往往就是在句中加入了与原文完全无关的些许成分。这些成分就成了我们戳穿谎言的标准。做这种题一定要本着抬杠的方法，只要说的不完美，含糊不清，故意夸大或隐瞒事实，无中生有，都算错。这种题是我认为最需要感觉的一类题了。
比较容易出推断题的地方，一个明显的标志是时间状语：before 2000, after 1999之类的。很可能就问你what can be inferred about _X after 2000或者before 1999. 看到这样的话，你要小心可能在此出推断题了。OG上的例子就是一个perfect example:
一看见这个题，首先就回到文中找相关信息，关键词：nineteenth century; 只要找到after nineteenth century就可以了。因为这种类型的题，给出时间状语，问某时点之后，文中给出的必然是该时点之前的内容。快速找到第一行和第三行都有19世纪的内容。第一句…. Was available to all，必然取反，选择19世纪之前，蜡烛是not available to all。而剩下三个错误选项说的全是19世纪以后才出现的内容。
另外，有助于你推断的也有可能是一些表示否定意思的词，比如different from, unlike, in contrast to等等。同样，文中给出诸如Unlike A, B is C的句子。然后题目问What can be inferred about A。那么把C取反，自然就是A的特点了。如OG Practice Set 1的第二题：
阅读的时候，看到unlike就要小心点;或者做第二题的时候，unlike可以帮助你有小定位。说unlike sea otters, it’s not easy to envision what the first whales looked like. 把这句话后半部分取反，那sea otters 自然是not difficult to imagine. 这也是对not easy to envision的反意paraphrase.
上面这两种应该算是推断题里最简单的，只需取反即可。还有就是纯粹需要靠推断的题了。推断不是臆断，而是必然由文中的信息能够推断出来的。但具体做起来有一定的难度。有些题需要用到简单的逻辑推理，更多的还需要前面提到的排除法。再拿上面文章8题举例：
第一段最后第二行，milksick(A)，是由于喝了病牛牛奶导致，病牛(B)是吃了有毒的叶子得的病(C), CèB, BèA, 则CèA. 而最后一条CèA就是正确答案的意思了。而错误的选项都加入了文中根本没有的元素，如A中的common illness, B中的children, D中的kill cattle，都在文中没有任何相关信息。所以都能够排除掉。
举个不太容易看出来的例子，OG Practice set 2，11题。
用排除法，A里的Government根本没提到。有人可能会说不是说有什么enforced program吗?这就需要抬杠了。非得由政府完成啊?那是你自己主观臆断的。原文根本没提到政府这回事，所以不行。B里的什么in cycle, change原文都没有;D更好抬杠，总不能大海也沙漠化吧。抬杠看似不讲道理，但正确的答案选项，你还真不好抬出杠来。因为都说得比较圆滑比较完善。不信你可以试试。这种方法看似有些荒.唐，但是杠抬得多了，一看就能看出来哪个长得像正确选项了。现在按照OG的方法证明一下正确选项D。这段第一句话说，在一些地区，减缓沙漠化的过程可能会非常困难。这必然说明作者相信沙漠化会继续，不然何谈slow or reverse?
推断题出的类型比较多，我也难以尽述。只能抛砖引玉，希望大家在练习中多找感觉了。极端、简单、假大空、无中生有都是典型的错误形式，而正确的答案看起来都让人很舒服。只要找到这种感觉，这种题不难做。
托福阅读推理类题目的解法
一、推理题的标志
托福阅读题型中推理题的题干中一般含有infer, imply, most likely, least likely, probably等词，分为有共性的推理题和无共性的推理题两大类。
二、推理题的做法
对于无共性的推理题，也就是托福阅读题干中无线索的，一般使用排除法，即根据各个选项的关键词回原文定位，通过排除法得出正确答案。
对于有共性的推理题，也就是托福阅读题干中有线索的，可以先圈定题干中的关键词，根据关键词回原文定位，然后进行推理。推理题主要有下列思路：
1.一般对比推理
ETS设计推理题的手段不多，根据两个事物的对比特征出题是其中之一。问其中一个事物的特征时，只要将与之形成对比的另一个事物的特征否定掉就可以了。例如：
It should be obvious that cetaceans–whales, porpoises, and dolphins–are mammals. They breathe through lungs, not through gills, and give birth to live young. Their streamlined bodies, the absence of hind legs, and the presence of a fluke and blowhole cannot disguise their affinities with land-dwelling mammals. However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like.
2. Which of the following can be inferred from paragraph 1 about early sea otters?
&<61;It is not difficult to imagine what they looked like.
&<61;There were great numbers of them.
&<61;They lived in the sea only.
&<61;They did not leave many fossil remains.
根据关键词sea otters定位第四句：However, unlike the cases of sea otters and pinnipeds…，由原文的unlike可知 sea otters 和 pinnipeds 两种动物与 whales 形成对比，而且很难想象原始的 whales 的样子;根据“一般对比推理”思路，可以推出“原始的 sea otters 的样子不难想象”。第一个选项表达了此意，为正确答案。
2.时间对比推理
这种思路常被考到。在这种推理中，一般有两个形成对比的时间段，它们所具有的特征一般相反。当题干问一个时间段的特征时，只要将与之相反的时间段的特征否定掉就可以了。
例一：
Basic to any understanding of Canada in the 20 years after the Second World War is the country’s impressive population growth….
…It appeared that Canada was once more falling in step with the trend toward smaller families that had occurred all through the Western world since the time of the Industrial Revolution.
…
It can be inferred from the passage that before the Industrial Revolution
(A)families were larger.
(B)population statistics were unreliable.
(C)the population grew steadily.
(D)economic conditions were bad.
工业革命之后与工业革命之前两个时间形成对比。既然工业革命之后西方世界的家庭变小了，那么工业革命之前的家庭一定比较大。因此(A)为正确答案。
例二：
Accustomed though we are to speaking of the films made before 1927 as “silent”, the film has never been, in the full sense of the word, silent. From the very beginning, music was regarded as an indispensable accompaniment; when the Lumiere films were shown at the first public film exhibition in the United States in February 1896, they were accompanied by piano improvisations on popular tunes. At first, the music played bore no special relationship to the films; an accompaniment of any kind was sufficient. Within a very short time, however, the incongruity of playing lively music to a solemn film became apparent, and film pianists began to take some care in matching their pieces to the mood of the film.
What can be inferred from the passage about the majority of films made after 1927?
(A) They were truly “silent.”
(B) They were accompanied by symphonic orchestras.
(C) They incorporated the sound of the actors’ voices.
(D) They corresponded to specific musical compositions.
1927年前后形成对比。既然1927年以前的电影只有音乐而没有配音，那么1927年之后的电影一定有。所以(C)为正确答案。
例三：
“…The nineteenth century brought with it a burst of new discoveries and inventions that revolutionized the candle industry and made lighting available to all. In the early-to-mid-nineteenth century, a process was developed to refine tallow (fat from animals )with alkali and sulfuric acid. The result was a product called stearin. Stearin is harder and burns longer than unrefined tallow. This breakthrough meant that it was possible to make tallow candles that would not produce the usual smoke and rancid odor. Stearins were also derived from palm oils, so vegetable waxes as well as animal fats could be used to make candles …”
Which of the following can be inferred from paragraph 1 about candles before the nineteenth century?
&<61;They did not smoke when they were burned.
&<61;They produced a pleasant odor as they burned.
&<61;They were not available to all.
&<61;They contained sulfuric acid.
问题：关于19世纪以前的蜡烛，从第一段可以推出下列哪一点?
这道题的题干中有“19世纪以前”这一时间，由此可见它属于“时间对比推理”思路。原文首句指出：“…19世纪带来了大量新发现和发明，使蜡烛业发生了革命性的变化，所有人都能用蜡烛照明。” 根据“时间对比推理”思路，由于19世纪以前的情况与19世纪形成对比，而19世纪所有人能用蜡烛照明，那么在19世纪之前，并非所有人都能用上蜡烛。第三个选项 “They were not available to all”表达了这一意思，为正确答案。
3.集合概念推理
集合概念推理也可以称之为百分比推断，它指的是在一个集合中，包含两个相对的方面，共同构成一个大的集合。一方所占的比例减少意味着另一方所占比例的增加;反之，一方所占的比例增加意味着另一方所占比例的减少。根据这一思路，可以由集合中一方的数量变化推断另一方的消减。
例一：
A folk culture is small, isolated, cohesive, conservative, nearly self-sufficient group that is homogeneous in custom and race, with a strong family or clan structure and highly developed rituals. …Unaltered folk cultures no longer exist in industrialized countries such as the United States and Canada….
By contrast, a popular culture is a large heterogeneous group, often highly individualistic and constantly changing.
22.What does the author imply about the United States and Canada?
(A) They value folk cultures.
(B) They have no social classes.
(C) They have popular cultures.
(D) They do not value individualism.
原文谈到folk culture 和popular culture两种文化，它们之间形成对比。既然美国和加拿大不再存在folk culture，那么它们就有popular culture。因此(C)为正确答案。
例二：
Both the number and the percentage of people in the United States involved in nonagricultural pursuits expanded rapidly during the half century following the civil war, with some of the most dramatic increases occurring in the domains of transportation, manufacturing, and trade and distribution.
What can be inferred from the passage about the agricultural sector of the economy after the Civil War?
(A) New technological developments had little effect on farmers.
(B) The percentage of the total population working in agriculture declined.
(C) Many farms destroyed in the war were rebuilt after the war.
(D) Farmers achieved new prosperity because of better rural transportation.
文中指出：非农业人口的数量和比例都增加了。由此可知农业人口的数量和比例下降了。所以(B)为正确答案。
托福阅读：推理题例题解题方法
托福阅读题型：推理题例题解题方法：
. Inference questions 推理题
推理题的标志是在题干中出现infer/imply/suggest/indicate/most likely 这样的词汇，它和细节题属于同源题目，都需要定位并且根据文中信息来选择答案。与细节题不同的是，推理题在找到原文中定位点之后考察的是学生对于文中信息的总结概括，或者反向推理的能力。我们来看一道例题，
It should be obvious that cetaceans-whales, porpoises, and dolphins-are mammals. They breathe through lungs, not through gills, and give birth to live young. Their streamlined bodies, the absence of hind legs, and the presence of a fluke3 and blowhole4 cannot disguise their affinities with land-dwelling mammals. However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses, whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like. Extinct but, already fully marine cetaceans are known from the fossil record. How was the gap between a walking mammal and a swimming whale bridged? Missing until recently were fossils clearly intermediate, or transitional, between land mammals and cetaceans.
Which of the following can be inferred from paragraph 1 about early sea otters?
○It is not difficult to imagine what they looked like
○There were great numbers of them.
○They lived in the sea only.
○They did not leave many fossil remains.
首先我们来对题目的出题范围进行定位，题干的blowhole可以作为定位词汇，定位到原文的第四句话：“However, unlike the cases of sea otters and pinnipeds (seals, sea lions, and walruses, whose limbs are functional both on land and at sea), it is not easy to envision what the first whales looked like.”在这句话里交代了“unlike the casess of sea otters”，即与sea otters不一样的是，whales的陈述是：it is not easy to envision what the first whales looked like.即，不容易看出第一头鲸长什么样子。而sea ottter是和鲸鱼相反，所以选择A选项，即不难看出第一头sea otter长什么样子。所以实际上，这种题目虽然叫做推理题，但是并不需要同学们在做题的时候推的过远，基本考察的还是对原文信息概括和总结的能力。
托福阅读题型之推理题的解题方法你了解了吗?我相信这次举例说明多多少少都能够帮助到你。最后希望大家能够好好的复习托福阅读，做好新托福考试当中的第一部分。
托福阅读推理题中的类比逻辑关系
很多同学最近一直和我抱怨，托福阅读中的推理题好难啊，很多题目的正确选项在文中都找不到，说好的忠于原文，说好的不用多想，不用为作者分忧解难呢?这时候我会偷笑，因为你们在托福阅读考试流程里碰到的是细节题的升级版本—─推理题!我们平时在阅读教学中一直和同学强调，阅读要忠于原文，不要大开脑洞，所有答案均出现在原文中。唯独有一种题目即推理题，需要学生不仅在文中找到相关依据，还要根据这个依据走一步推理的过程，才能得出答案。
今天就想和大家分享一下阅读推理题中涉及到的一种逻辑推理关系 — 类比关系，此类逻辑关系一般出现在对比类的文段中。即文章中出现A,B两个比较对象， A与B有相同特征，于是我们可以根据A的特证来推断B也有相同的特征。举个例子：像小明一样，小红爱吃西瓜，于是乎我们可以从这句话里推断出不仅小红爱吃西瓜，小明也爱吃。接下去，我们就来看看这种逻辑关系在推理题中的应用。
Paragraph 1: When it comes to physiology, the leatherback turtle is, in some ways, more like a reptilian whale than a turtle. It swims farther into the cold of the northern and southern oceans than any other sea turtle, and it deals with the chilly waters in a way unique among reptiles.
What can be inferred about whales from paragraph 1?
A . They are considered by some to be reptiles.
B. Their bodies are built in a way that helps them manage extremely cold temperatures.
C .They are distantly related to leatherback turtles.
D .They can swim farther than leatherback turtles.
这道题目，题干问我们根据第二段的内容我们可以对鲸鱼作出何种推断，于是乎我们根据解题技巧快速回到文中搜索定位词whales, 找到以下这句话 ”the leatherback turtle is, in some ways, more like a reptilian whale than a turtle.” 这句话告诉我们leatherback turtle更像爬行的whales, 虽然此句没有直接提到whales的特征，但我们可以根据刚刚提到的类比关系做一步逻辑推断啊。既然leatherback turtle很像whales, 那么leatherback turtle的特征也应该就是whales的特征，因此我们只要找到leatherback turtle的描述信息即可发现whales的特征。原文最后一句话提到， leatherback turtle会游到寒冷的南北海洋并且有特殊的处理冰水的能力。于是乎我们可以得出whales也有相同特征。答案对应B选项。
再来看一道稍难的题目吧
Buck rubs also have a scent. These odors make buck rubs an important means of olfactory communication. Forehead rubbing by male deer on buck rubs presumably sends a great deal of information to other members of the same species. The presence of many well-marked rubs is indicative of older, higher-status males being in the general vicinity rather than simply being a crude measure of relative deer abundance in a given area. The information conveyed by the olfactory signals on a buck rub make it the social equivalent of some auditory signals in other deer species, such as trumpeting by bull elk.
What can be inferred from paragraph 4 about the trumpeting of bull elk?
A.Trumpeting by higher-status bull elk signals their presence to other members of their species.
B.Bull elk need to combine trumpeting with olfactory signals to covey information about their identity.
C.Trumpeting alerts white-tailed deer to the presence of bull elk in their vicinity.
D.Trumpeting provides a better measure of deer presence in a given area than buck rubs do.
此题问我们，根据第四段我们可以对trumpeting of bull elk做出怎样的推断。根据关键词trumpeting of bull elk我们快速找到原文最后一个单词。既然是出现在文章的最后位置，那我们只好去往前推了。而前句又提到了一个我们非常熟悉的逻辑关系—─类比关系。来看这句话 The information conveyed by the olfactory signals on a buck rub make it the social equivalent of some auditory signals in other deer species, such as trumpeting by bull elk.这句话告诉我们buck rub发出的olfactory signal和trumpeting of bull elk发出的auditory signal有相同的社会作用。根据前文我们知道buck rub可以反映年长雄鹿在鹿群里的社会地位。于是乎我们便可以做进一步推理，即trumpeting of bull elk也应该有相似地功能。
我想，只要我们的同学能够熟练掌握这种逻辑推理方法，将来一定可以避免在做这类推理题时常常出现的无从下手的困境。
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