[讨论]Prep 1-28,

churfeng

这个题为什么不选B呢？E的COULD是过去时态，和整个句子的时态不符啊。

 

XDF的一个老师说，COULD ,MIGHT在GMAT里没有表示委婉的意思，只表示是过去时态

 

 

28.   (26003-!-item-!-188;#058&002229)

 

Polio, although it is eradicated in the United States, it continues elsewhere and is able to be brought into the country by visitors.

 

(A) Polio, although it is eradicated in the United States, it continues elsewhere and is able to be

(B) Polio, although eradicated in the United States, it still continues elsewhere and can be

(C) Although still continuing elsewhere, polio has been eradicated in the United States and could be

(D) Although having been eradicated in the United States, polio still continues elsewhere and is capable of being

(E) Although eradicated in the United States, polio continues elsewhere and could be

jandjshi

B: "Polio" and "it", 两个主语.

Don't follow the rule 100%. The goal is to pick the BEST answer, not the perfect answer, among the 5 choices.

applec

"could" is the usage of unreal past tense.

example:

If I were you, I would marry her.

the would is a past tense but it means the conditional case.

so the "could" form here means the possibility, not the ability.

lcy19812000

Prep Grammar Note says: having been eradicated in C is incorrectly used.
    

I think it is okay to use although having been done here - past perfect tense plus passive mode.

Anybody can tell me why, thanks?

lcy19812000

I get it.

The phrase after/although having been done is wrong. We should substitute after/although done for it anytime.

[此贴子已经被作者于2009-3-15 6:06:42编辑过]

AlienX

after之後是不能followed by "having (been) done something", 書上有說.
可是although之後就不是很肯定.
想問一下lcy在那看到"although having been done is wrong"? 可能我miss out something important point...

lcy19812000

To AlienX:

From any grammar book, we can see that as a participle, having been done is incorrect anywhere. It is redundant and needs to be replaced with done.

This is my note taken months ago:

The Participle (Present Participle/ Past Participle)

1.       用法：作副词或形容词，Present Participle：表主动，Past Participle：表被动；

2.       Tense and Voice of The Present Participle：

doing                                    being done（被动加进行）

having done                        having been done（表被动加完成，但过于罗嗦，没有done好）

3.       Tense and Voice of The Past Participle：

    done（表被动加完成）                 

eg2: Most of the artists ______ to the party were from South Africa.

A) invited    B) to invite    C) being invited    D had been invited

析：选A。D项不是非谓语，因为不是have而是had，变成have been done也没有done简洁。

lcy19812000

Let me know whether you get it.

[此贴子已经被作者于2009-3-15 16:12:04编辑过]

AlienX

prep2:75.       Some patients who do not respond to therapies for depression may simply have received inadequate treatment, having, for example, been prescribed a drug at a dosage too low to be effective or having been taken off a drug too soon.