今天小编跟大家分享关于托福阅读常考规律，为大家在阅读理解上铺平道路：
Perhapstheir rush to adulthood is driven by a simple need to keep warm.
规律1： perhaps这种词不能算是重点的态度词。
Located in tropical areas at low altitudes, savannas are stable ecosystems, some wet and some dry consisting of vast grasslands with scattered trees or shrubs.
规律2： 挑选关键词的一个原则：具体，直接，生疏。比如上句中，不考虑状语修饰的问题，关键词为 tropical, low altitude, savanna, wet, dry, grassland, scattered, shrubs。
They occur on a wide range of soil types and in extremes of climate.
规律3： 表示“发生”类的词往往是比较虚的词，不需要特别记忆。如 occur,happen, take place等。
Savannas typically experience a rather prolonged dry season.
规律4： 有的时候，要学会分辨“无用”的概念。比如 experience a xx season其实属于虽然具体，但无用的概念。我们可以直接把这句话理解为 Savanna could be dry for a long period.
For example, savanna soils, like many rain forest soils, are typically oxisols (dominated by certain oxide minerals) and ultisols (soils containing no calcium carbonate), with a high acidity and notably low concentrations of such minerals as phosphorus, calcium, magnesium, and potassium, while aluminum levels are high.
规律5： while本意为并列发生，但会隐含轻微的转折意。
These soils usually contain large amounts of clay and easily become water-saturated.
规律6： 逻辑替换，本处and看起来是并列，实际上有轻微的因果意。
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Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor.
规律7： prone to do这类词可以和fail to do这类词做等同，都可以当做表示某种倾向的“情态动词”。
Evidence from other studies suggests that exclusion of fire results in markedly decreased plant-species richness, often with an increase in tree density.
规律8： 要注意exclude，exclusion这样隐含的否定词。
On certain sites, particularly in South America, savanna formation seems related to frequent cutting and burning of moist forests for pastureland.
规律9： be related to 和be associated with 很多地方很相似，都可以表示多重逻辑。比如这里，related to偏向于因果。