托福阅读句子插入题考察句子间逻辑，在解题时利用逻辑来解题是出于题型考点的考虑，而且往往也是最高效的。所以前程百利小编结合例题为大家带来句子插入题的逻辑分析法，希望对大家有所帮助。
托福阅读中的逻辑关系是考生理解文章需要的，考生能够通过其中的起承转合明确句子和句子之间的关联。要知道利用逻辑解题法的前提是找到句子中的逻辑。托福阅读中的常见逻辑关系有：果关系，标志词是Therefore, due to, as, for, thus, hence, consequently以及能够表达“引起、造成”、“起源于、由…而来”意义的词;并列关系，标志词是also, both…and…, either...or..., equally, similarly等;转折关系，标志词是标志词是while, whereas，nevertheless, despite, even if，however等;还有让步、递进、条件、比较等等逻辑关系。接下来，则需要对句子进行分析，仅依靠句子猜测前后文的内容情况，然后回到原文找答案。
托福阅读句子插入题如何使用逻辑分析法解题呢?接下来从三个例题对应的三种逻辑运用来分析：
来自TPO-3Architecture中的句子插入题，解题时可以运用转折逻辑分析。
Paragraph 5: █Modern architectural forms generally have three separate components comparable to elements of the human body; a supporting skeleton or frame, an outer skin enclosing the interior spaces, and equipment, similar to the body’s vital organs and systems. █The equipment includes plumbing, electrical wiring, hot water, and air-conditioning. █Of course in early architecture—such as igloos and adobe structures—there was no such equipment, and the skeleton and skin were often one. █
待插入句：However, some modern architectural designs, such as those using folded plates of concreter or air-inflated structures, are again unifying skeleton and skin.
分析：根据原句中的However可以明确这句话和前面内容的转折关系。这句话表明“一些现代建筑设计，皮肤和骨骼也往往合在一起”，所以前面的内容会和这句话造成一种对比，从这句话可以猜测前面会不会提到之前的设计情况，而且也会提到skeleton and skin?回到原文，段落的最后一句中的时间概念标志可以从“in early architecture”看出来，而且也提到了skeleton and skin，正好是猜测中的，所以选择第四个插入口。
来自TPO3The Long-Term Stability of Ecosystems中的句子插入题，可以利用比较逻辑解题，其中还涉及到转折逻辑的辅助作用。
Paragraph 6: █Ecologists are especially interested to know what factors contribute to the resilience of communities because climax communities all over the world are being severely damaged or destroyed by human activities. █The destruction caused by the volcanic explosion of Mount St. Helens, in the northwestern United States, for example, pales in comparison to the destruction caused by humans. █We need to know what aspects of a community are most important to the community’s resistance to destruction, as well as its recovery. █
待插入句子：In fact, damage to the environment by humans is often much more severe than damage by natural events and processes.
分析：句子中的In fact是一种并不明显的转折关系，句子中的much more…than…是比较逻辑的标志。从本句比较逻辑看，句子前应该提到了“damage by natural events and processes”即由自然因素造成的伤害;句子后面应该是人类活动造成的伤害描述，这个句子是两个部分的一个转折句，In fact则可以加深我们的判断。回到原文，第一句提到了人类活动，第二句说到“volcanic explosion”，是自然现象，所以第二个插入口出现待插入句是合适的。
再来看来自TPO4 Cave Art in Europe中的句子插入题，解题可以利用因果逻辑。
Another explanation for the focus on animals might be that these people sought to improve their luck at hunting. █This theory is suggested by evidence of chips in the painted figures, perhaps made by spears thrown at the drawings. █But if improving their hunting luck was the chief motivation for the paintings, it is difficult to explain why only a few show signs of having been speared. █Perhaps the paintings were inspired by the need to increase the supply of animals. Cave art seems to have reached a peak toward the end of the Upper Paleolithic period, when the herds of game were decreasing. █
待插入句：Therefore, if the paintings were connected with hunting, some other explanation is needed.
分析：原句中的Therefore指示本句话是一句总结，或者说是一个结果的描述，所以前面必然有明确的原因阐释。本句话说“如果绘画和狩猎有关，那么还需要另外一些解释”，猜测前面应该提到了一些证明绘画和狩猎有关的解释性的内容，后面还是一些解释。回到原文，段落第一句是一个解释内容，接下来的两句和它密切联系，之间不需要其他句子，倒数第二句是个解释性的内容，所以选择第三个插入口。
以上就是前程百利小编为大家带来的托福阅读句子插入题的逻辑解题法相关介绍，在这类题型中，根据翻译来解题是极不明智的，希望考生注意。预祝大家托福考试取得好成绩!
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