Often major economic shifts are so gradual as to be indistinguishable at first from ordinary fluctuations in the financial markets. A. so gradual as to be indistinguishable B. so gradual so that they can be indistinguishable C. so gradual that they are unable to be distinguished D. gradual enough not to be distinguishable E. gradual enough so that one cannot distinguish them
解释中说C选项错的原因是C. able/unable to be done的结构错误 ,还是不太明白为什么啊,求各位NN解答! (谢谢一楼指教,已加线)
好像不是这样的。
被动语态之所以有时候在GMAT中优于主动语态,就是因为被动语态可以不用说出动作发出者而避免错误。这里的be distinguished 动作的发出者是一个没有说出来的人,至于这个人是谁没必要知道,所以不必说。
这句话不对好像只是因为be able to be done 是不对的
Ron说一道题,错误选项有because of A's inability to be measured (A是一个类似物理学上的力的东西)这里inability也有同样的问题......
而正确答案是because A cannot be measured,显然这里measured的发出者不必指出,但一定是某个人
所以我们可以推而广之,很多时候be able to都不太好,换成can。一是简洁,二是在主语是non-live thing的时候,或者后面还是passive voice的时候,一般都不能用be able to
所以大家不应该不棒子打死,说能力不能用被动
open to discuss