RonPurewal Wrote:yaoL613 Wrote:if the sentence is
subject+-ing+main clause
and the -ing doesnt make sense with the main clause, then the choice is just fine. The -ing can just modify the subject.
wrong.
if an __ing modifier is demarcated with commas, it
must be related to the meaning of the whole sentence, regardless of whether it's placed--before the sentence, after the subject, or after the sentence.
see here:
post75891.html#p75891and here:
post102559.html#p102559
Thank you for your explanation, but it makes me confused.
This is the OG13 25
Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.
(A) Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are
(B) Neuroscientists, having amassed a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
(C) Neuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are
(D) Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood,
(E) Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood.
You says CD are wrong because the two actions:"have amass knowledge" and "draw conclusion" dont make sense, that is the later is not a "immediate consequence" or "simultaneous, but lower-priority"of the former.
But in the correct answer A, there are the same actions as in CD, and this time, the former modify the later.
Only by exchanging the consequence of the two actions, can these two sentence make sense?
You says the -ing should modify the whole sentence wherever the it is placed, but in A, the -ing can not modify the main clause,
because no matter how you change their consequence, they are not related.
Or the "having been" is a kind of modify that expresses a time consequence, and that is not belong to the pattern of "immediate consequence" or "simultaneous, but lower-priority"of the former.
I edit my post for a long time to make it clear, am i?