想问个抽象点的问题……

edmundshi

RT
        

我想问，现在完成进行时(have been doing)的助动词是什么？

        

做Prep上的一道题 1-183想到的：

        

Despite recent increases in sales and cash flow that
have propelled automobile companies' common stocks to new highs, several
industry analysts expect automakers, in order to conserve cash, to set dividends more conservatively than
they were

        

A. to set dividends more conservatively than they
were

        

B. to set dividends more conservatively than they have
been

        

C. to be more conservative than they have been in
setting dividends

        

D. that they will be more conservative than they were in
setting dividends

        

E. that they will be more conservative than they have
been to set dividends

        

 

        

网上讨论，可以根据expect sb. to do排除DE，时态排除A

        

关于B，主流说法是have been 后面没下文了，所以错。 CD的老贴：http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=372236&page=1

        

前人的解释是：如果比较级的第一部分用副词，那么修饰的是动词set，than之后句子就不能是联系动词，而是应该用do: to set DIV
more conservatively than they have done. -- 排除AB

        

 

        

但是我是这样看have been的，我把它看成have been
doing现在完成进行时的的助动词省略，补全是have been setting。

        

所以想问问现在完成进行时的助动词究竟是什么，have? have
been?

ogram

这里考的是平行结构

前面是be conservative,后面才能用have been (conservative)

如果前面是conservatively,后面就没法用have been (conservative)了,因为前面是副词,后面是形容词,不平行了.set在这里是及物动词,即便补成have been setting,也是不完整的;如果补成have been setting dividents,既罗嗦,还不达要点.因为这句话要点就是讲conservative.所以不如用C选项简洁明了

edmundshi

……

我知道选C

能回答我关心的问题吗？