求教verbal一题，to do 能否做主语？还有对官方解释的不明白，在线等，急急急

ivansmile33

27题：Obtaining an investment-grade rating will keep the county's future borrowing costs low, protect its already-tattered image, and increase its ability to buy bond insurance.

(A) Obtaining an investment-grade rating will keep the county's future borrowing costs low, protect
(B) To obtain an investment-grade rating will keep the county's future borrowing costs low, and protect
(C) Having obtained an investment-grade rating will, in keeping the county's future borrowing costs low, protect
(D) To obtain an investment-grade rating would keep the county's future borrowing costs low, protecting
(E) Obtaining an investment-grade rating, keeping the county's borrowing costs low, would be protecting


这题疑问是：像我知道是ing能做主语，可是to do能做主语么，读起来很不通顺，而且像官方对B 的解释是：to obtain suggests that obtaining an investment grade rating is an objective in and of itself，not a means to achieve the desired benefits

前一句解释我的理解就是to do 不能做主语，我见过的都是 to do sth,完整句子。否则的话todo没修饰的对象，后一句理解的不好，就算to do 是错的，但是to do 也是表达了一种目的，难道不是方法？ing就可以方法？
求各位牛牛的帮助了，我知道 其他选项用别的错误页可以排除，但是就是对todo 有疑问


对了，D选项也有疑问，就是解释说protecting 引导了一形容词短语来描述主句主语，如果todo不能做主语的话，不就没有主语修饰了？然后解释还说，这样就使得increase 变成没有主语的verb，不懂啊不懂啊，求赐教

HerringtonD

to do 可以做主语
比方 To see is to believe.　百闻不如一见。

ivansmile33

那怎么解释og的解释呢：而且像官方对B 的解释是：to obtain suggests that obtaining an investment grade rating is an objective in and of itself，not a means to achieve the desired benefits

ivansmile33

up

sisichen666

没太看懂LZ想问的具体问题，（我感觉是想问doing和to do作主语的区别吧？）
obtaining表示一种方式，会有怎样的结果，一种假设，之后跟will。
to obtain一般表示目的，之后一般跟条件，怎样做才能得到。（就是刚刚LS提到的to do is to do是经常用的句式）

sisichen666

那怎么解释og的解释呢：而且像官方对B 的解释是：to obtain suggests that obtaining an investment grade rating is an objective in and of itself，not a means to achieve the desired benefits

-- by 会员 ivansmile33 (2012/9/25 19:19:36)

这个解释就是：to obtain表目标，“is an objective in and of itself”意思是“其本身就是目标”，但实质上题目中它是一个解决问题的手段方法，改变了句意，并且lz也发现我们经常碰到的是：To do sth，SVO——那么也就是说应该是有一个动作的发出者（谁想要obtain？）

ivansmile33

而且像官方对B 的解释是：to obtain suggests that obtaining an investment grade rating is an objective in and of itself，not a means to achieve the desired benefits


这样看的话B结合答案解释我也没法理解，难道不是再说todo做不了主语么

维以不永伤6

这么来理解吧，to do可以表示方式，也可以表示目标。


To obtain在此表目标的话，那原句就成了:为了达成什么目标将会产生什么效果（就是keep……protect……increase……）这完全不通，应该是obtaining……（已经达成了……/就达成……这个事情而言）would产生什么效果才对。

ivansmile33

嗯嗯 有点想明白了

还有一点疑惑啊，对了，D选项也有疑问，Og解释说protecting 引导了一形容词短语来描述主句主语然后解释还说，这样就使得increase 变成没有主语的verb
不懂啊不懂啊，求赐教 ，如果todo不能做主语的话，不就没有主语修饰了？

HarrisZheng

而且像官方对B 的解释是：to obtain suggests that obtaining an investment grade rating is an objective in and of itself，not a means to achieve the desired benefits


这样看的话B结合答案解释我也没法理解，难道不是再说todo做不了主语么

-- by 会员 ivansmile33 (2012/9/25 20:32:14)

不要光纠结语法，也要看句子是不是make sense。 LS的已经讲的很清楚了，to do本身有表达目的的含义