OG 12 -44

mliu9

正确： in contrast to large plants that take iron ore through all the steps needed to produce several different kinds of steel, small mills, by processing steel scrap into a specilized group of products, have been able to put capital into new technology and remain economically viable.

错误： small mills, by processing steel scrap into a specilized group of products, have been able to put capital into new technology and remained

两个选项不同之处在于remain 和 remained
OG解释： been able to put....and remain...
但是，就算我理解成 have been able to put....and (have) remained...有什么错呢？

babybearmm

建议你看看OG12 42题，B选项的解释  the ostensible parallel ... is superficial....
英语里面几乎不会把be和do平行，比如不会说：
I was a business woman and ran my own company.   (awkward)
要平行，就是：
I was a business woman and a enthusiastic traveler.
I ran my own company and traveled around the world.
当然这只是我感觉，不敢100% sure

至于这道题，你注意语义
Small mills, by (some methods), have been able to put ___ and remain ____.
符合逻辑。
如果按你所说的平行：
Small mills, by (some methods), have been able to put ___ and remained ____.
从意思上看，(some methods) enable small mills to remain ____.  So you should explicitly point out the meaning of "enabling".  This is the reason that you need to keep the "remain ___" part parallel to the "put ___" part.

正确： in contrast to large plants that take iron ore through all the steps needed to produce several different kinds of steel, small mills, by processing steel scrap into a specilized group of products, have been able to put capital into new technology and remain economically viable.

错误： small mills, by processing steel scrap into a specilized group of products, have been able to put capital into new technology and remained

两个选项不同之处在于remain 和 remained
OG解释： been able to put....and remain...
但是，就算我理解成 have been able to put....and (have) remained...有什么错呢？

-- by 会员 mliu9 (2012/2/11 4:35:01)

yiayia

这题不是OG上的吧~~~找不到

之所以不用 have remained, 是因为remain 的意思是to continue to be in the same state or condition，不是瞬时动词，有持续之意，因此不用现在完成时。同样remain也不能用在is　ｒｅｍａｉｎｉｎｇ里