have been doing和have done的区别

XU十易

OG16 的53题:
Along the major rivers that traverse the deserts of northeast Africa, the Middle East, and northwest India, the combination of a reliable supply of water and good growing conditions both encouraged

farming traditions that, in places, endure in at least 6,000 years.

(A)good growing conditions both encouraged farming traditions that, in places, endure in

(B)good growing conditions encouraged farming traditions that have, in places, endured for

(C)of good growing conditions have encouraged farming traditions that, in places, endured for

(D)of good growing conditions both encouraged farming traditions that have, in places, endured

(E)of good growing conditions encouraged farming traditions that have, in places, been enduring for

我知道答案选B

但是就是不是很理解E选项OG的解释。

OG是这样解释的：

The use of the present perfect progressive have been enduring is not grammatically incorrct, but it is rhetorically inappropriate and sounds exaggerated.

我不是很理解它的解释，然后我想问一下，在GMAT考试中有没有严格的关于have done和have been doing的区别。

本人是小白，希望NN能解释一下这个问题！么么哒！

XU十易

别沉下去啊帖子！！！

XU十易

NN帮帮我！！！

MooseEva

不是NN哦~不过也说说自己的看法

Have been doing：表达一种动作在过去发生了但持续在进行的意思；强调的是一种进行的状态；
而have done表达的是一种动作发生在过去，完结了后状态持续到现在，或者发生在过去但是动作没有完结持续到现在；

那么句子中说用完成进行时太夸张的意思就是：句子其实并没有表明endure这个动作是已经持续了6000年就完结，还是6000持续了之后还继续进行。但是完成进行时就表示了后者，强加了意思。

XU十易

MooseEva 发表于 2015-10-10 11:01
不是NN哦~不过也说说自己的看法

Have been doing：表达一种动作在过去发生了但持续在进行的意思；强调的是 ...

谢谢你啦，感觉理解了很多，特别是你对“夸张”的解释！

MooseEva

XU十易 发表于 2015-10-11 10:30
谢谢你啦，感觉理解了很多，特别是你对“夸张”的解释！

不客气哟！~楼主加油！

XU十易

MooseEva 发表于 2015-10-11 15:10
不客气哟！~楼主加油！

嗯嗯！！！加油

Johnsy123

the combination of a reliable supply of water and good growing conditions中a reliable supply of water是a complex gerund,good growing conditions 是simple greund,用and连接不是要平行吗，可是mahattan 说simple gerund 不能跟complex gerund平行呀？求解，我写的有点乱不知道大家看不看得懂

branxu

我从句子意思角度来说吧，这种结合实质上改变了现在的艰难情况，因此这个动作不会再进行下去了，以后不需要再endure了

crazytime

感觉这里是endure这个词本身的原因造成is rhetorically inappropriate and sounds exaggerated.