Because he had not experienced any symptoms until adulthood

The problem with E is twofold. The major one is the shift of the time marker of the verb tense. Actually the lack of symptom is the earlier one and hence has to be described in past perfect as - had not experienced-. The second symptom, namely the facial paralysis, was set on much later in the early stages of the actual disease, much after his adulthood, and hence we need to use a simple past tense.
The second minor problem as I see, is the use of - since - to mean because, which is not desirable according to GMAT. So E is inferior.

Hi daag
plz explain every options verb tense problem................

I think people are getting confused here about the basic meaning of the sentence:

Eliminating B and D on the basis of tense. Has not/ had been/had been

We are left with A, C, E

Check A first:
if one can't understand the meaning, test the timeline:
Past perfect----->Past------>Present
He had not experienced any symptoms till adulthood (From birth till adulthood)----->He was facing facial paralysis (which according to passage suggests is a symptom of GBS and not complications of Polio)----->Diagonis may be wrong (suggestion in present)

C's timeline
Early on he experienced problems and having not experienced...hhmmmmmmm....
----> He had facial paralysis and also did not have any symptoms (Overlap of timeline....because past and present perfect continuous suggests continuation till present) -- > Total confusion here!

E's timeline
He did not face symptoms but had facial paralysis
Its like the best contradiction ever!
How can a person not face any symptom but have facial paralysis?
E negated.

Left with A
So OA is A

Hope this helps!

Hello daagh

With respect to sentence A , as long as Roosevelt is no more , the writer shouldn't have used the present perfect in " my have suffered" . please correct me if I am wrong
Thank You.

The correct answer here should be A. There are two events happening in the past.

1. Experiencing symptoms until childhood and
2. facial paralysis early on the course of illness.

Not to express first we need past tense and for second we need simple past tense. A correctly addresses these two events.

this question is so confusing between A and E.
A is much better than E b/c of "until"
(B)Since he has experienced his symptoms in adulthood and has been affected by facial paralysis early on in the course of his illness
(C)Early on in the course of his illness he experienced facial paralysis and having not experienced any symptoms until adulthood
(D)Because he had not experienced any symptoms until adulthood, he had been affected by facial paralysis early on in the course of his illness meaning and structure changed.

[quote="mun23"]Because he had not experienced any symptoms until adulthood and was affected by facial paralysis early on in the course of his illness, Franklin Delano Roosevelt, whose death was originally attributed to complications arising from polio, may actually have suffered from symptoms related to Guillain-Barre syndrome.

(A)Because he had not experienced any symptoms until adulthood and was affected by facial paralysis early on in the course of his illness
(B)Since he has experienced his symptoms in adulthood and has been affected by facial paralysis early on in the course of his illness
(C)Early on in the course of his illness he experienced facial paralysis and having not experienced any symptoms until adulthood
(D)Because he had not experienced any symptoms until adulthood, he had been affected by facial paralysis early on in the course of his illness
(E)Since he did not experience any symptoms until adulthood and had been affected by facial paralysis early on in the course of his illness


look at choice A
had not experience until adulthood
is incorrect, I think

this require simple past.
am i correct?

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