从小到大，无论是英语还是汉语，老师都会告诉我们“但是”很重要。在托福听力中，我们都知道无论是在对话还是讲座中，我们都应该对待“but“一种词要保持警惕，但有时转折点会让人措手不及。下面由新航道的沈阳托福培训小编为您解答！

　　与转折相关的信号词如：but;yet;however;though;as a matter of fact;actually;while; on the other hand; 这些想来大家都很熟悉，这里就不一一赘述了。

　　那么在什么前提下，我们可以合理预测这些“但是”的出现呢？

　　1、当教授解释或回答一个问题时，我们可能会首先抛出一个看似正确的信息或实际上是错误的信息，然后我们可以等待正确的信息跟随转折点。

　　常见表达：*Whatisnot…,but/instead…;*you may think that…, But actually….;*It appears/seems…,But…;*wethought/ assumed…, but…

　　e.g.（tpo16 L3）

　　Another critical issue and it’s related to the first, to the size issue, is how far from the water should it go to get trees.  …… Will it travel farther For a larger tree than It will for a smaller tree?

　　Now I would have thought (先给出看似合理的错误信息，预测后会出现转折点，引出正确信息) the bigger the tree, the farther the beaver would be willing to travel for it. That would make sense, right?…… But actually, the opposite is true.

　　2、当讲座中讨论的话题没有明确的结论时，教授可以先提出一些概率猜想、假设或理论，然后很可能通过转折点反驳或提出理论中存在的问题（注：这种情况经常与各种情况相结合）。

　　常见表达：*one theory is that…/ the first hypothesis is…, but….

　　e.g. （tpo35 L3)

　　Byabout10，000B.C.E.,allthosegiantcreatures,theMegafaunaofNorthAmericaweregone.Wedon'tknowexactlywhathappenedtothem, buttherearesometheories(提出理论的不确定性).

　　One theory(提出概率理论，在听的过程中，要准备好可能出现在理论背后的反驳信息) is that they were hunted to extinction by humans. The humans who coexisted with these giant species in North America at that time were what we today called the Clovis People. And there is a Clovis site in a valley in southern California where the remains of thirteen mammoths were found.…That would appear to be some pretty compelling evidences.But then(异议:Clovis一般会杀死小动物，可能没有能力杀死猛犸象和其他大型动物) at other Clovis sites, there's also a lot of evidence that the Clovis people mostly gather plants and hunted small game, like rabbits and wild turkeys…

　　3、妥协。我们都应该熟悉这一点。妥协的出现是为转折做准备。虽然although和but可能不会同时存在，但我们仍然需要知道although的后半部分是转折点，这是重点。

　　常见表达：although/ though….,(but)….; there is no denying that…., but….

　　e.g. （tpo47 L1）

　　…Let’s look at a play by Victor Hugo called Hernani…Although Hugo was a truly brilliant writer of essays, poems, novels and plays, uh…, his play, Hernani, isn’t a great play in and of itself(虽然雨果很棒，重点:但他的作品并不是很成功).

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