在托福阅读中长难句是同学们遇到的一大难题，能否搞定长难句直接决定了考生能否把题目答对，下面前程百利小编用案例分析长难句对托福阅读答题的重要性，帮助高生答疑解惑。
例如，TPO3-2 Depletion of the Ogallala Aquifer
Paragraph 5 mentions which of the following as a source of difficulty for some farmers who try to conserve water?
A. Crops that do not need much water are difficult to grow in the High Plains.
B. Farmers who grow crops that need a lot of water make higher profits.
C. Irrigating less frequently often leads to crop failure.
D. Few farmers are convinced that the aquifer will eventually run dry.
通过题目中的Paragraph 5和difficulty for some farmers who try to conserve water可以定位原文为The incentive of the farmers who wish to conserve water is reduced by their knowledge that many of their neighbors are profiting by using great amounts of water, and in the process are drawing down the entire region’s water supplies.
在托福阅读的答题过程中，如果不能很好的理解长难句就会影响答题效果。对于这样的长难句最直接有效的方式就是对其进行句子结构分析，迅速把握整个句子的意思。
在这个句子中The incentive of the farmers谓语是is reduced，因此句子的主干为The incentive of the farmers is reduced by their knowledge.在句子中 who wish to conserve water作the farmers的定语，that many of their neighbors are profiting by using great amounts of water, and in the process are drawing down the entire region’s water supplies, that引导的句子做knowledge定语。在that引导的定语从句中包含两个句子，many of their neighbors are profiting by using great amounts of water和in the process are drawing down the entire region’s water supplies是因果关系。
因此本句话的主要内容是当那些想节水的农场主得知邻居们通过大量耗水的种植而盈利的时候，他们的热情降低了，从而导致了整个区域的供水量的减少。
通过以上的分析，考生理解到农场主降低了热情其实就是供水减少了，题目中问道供水减少的原因和文章中农场主得知的信息是有关的，正是由于农场主得知的这些信息使他们供水有了困难，因此答案就是many of their neighbors are profiting by using great amounts of water，跟这句话句义一样的是B 选项，农民为了获取利润，大量种植庄稼消耗了水源。
通过以上分析考生可以看出，只有学会分析长难句，弄懂句子的意思，考生才能在理解原文的基础上进行答案的选择，保证正确率。
以上就是论长难句对托福阅读答题的重要性。希望通过本道题目的分析考生可以对于长难句理解的重要性有了新的认识，小编建议考生在备考过程中多多实践攻克托福阅读!
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