Some patients who do not respond

[RonPurewal]

Hi everyone,
Just to add on , For eliminating option D can we say its a fragment.
because the sentence construction is
(Independent clause-1),example (independent clause-2)
In option d, The independent clause-2 is actually not independent or standalone.

no.
grammatically that's fine; "when" is a subordinating conjunction.

[saintjingjing]

why can not choose B, in meaning, I think B is clear too

[RonPurewal]

why can not choose B, in meaning, I think B is clear too

"having" + "was ineffective" doesn't make sense.

"having" adopts the same timeframe as the rest of the sentence -- which is the present (we can discern this by noticing that the sentence is talking about patients who do not respond). however, "was ineffective" seems to suggest that the prescription was ineffective sometime in the past.
taken together, these two contexts seem to indicate that the patient is, for some reason, holding onto an old prescription that was ineffective.

[xingym]

why can not choose B, in meaning, I think B is clear too

"having" + "was ineffective" doesn't make sense.

"having" adopts the same timeframe as the rest of the sentence -- which is the present (we can discern this by noticing that the sentence is talking about patients who do not respond). however, "was ineffective" seems to suggest that the prescription was ineffective sometime in the past.
taken together, these two contexts seem to indicate that the patient is, for some reason, holding onto an old prescription that was ineffective.

hi Ron

I unserstand that "having" adopts the same timeframe as the rest of the sentence, but the main clause is that " some patients who..... may have received....", in this case the verb tense is in simple past rather than present, isn't it?

[RonPurewal]

I unserstand that "having" adopts the same timeframe as the rest of the sentence, but the main clause is that " some patients who..... may have received....", in this case the verb tense is in simple past rather than present, isn't it?

"may have received" is written in the present perfect tense. the present perfect describes (usually recent) past events, but is written from the standpoint of the present. in fact, that is why it's called the "present perfect".
so, the ambient timeframe of that clause is the president.

[thanghnvn]

I have a question. Ron, manhantan experts, pls, help

I meet him when learning English

is not acceptable on gmat.

learning English, I meet hem

is acceptable on gmat.

Is that thing right?

I see a following question in og 10, in which e is refused. Reason for refusion possibly is not PREPOSITION DOING BEHIDE, not "when willing" behide.

[deleted because problem is from a banned source - see below]

[tim]

OG is a banned source; it is illegal to post OG questions anywhere on the web. If you are in one of our classes, please ask OG questions during office hours or before/after class..

Not only can we not discuss details of OG10 questions, but you also did not make it clear how that question related to the larger discussion..

As for your example sentences, they are both wrong, but possibly for reasons other than the topic you're intending to discuss. I can't tell actually, because you haven't really made it clear what you're trying to discuss. Please take another look at what you were trying to write, make it clear what you are asking, and be sure to use correct grammar in your post so we can understand what you are trying to ask about..

[davetzulin]

i still don't understand why D is wrong outside of just akwardness

D -- when they have, for example, been prescribed too low a drug dosage for it to be effective, or were

have been and were seem to be parallel on the surface, two people including an instructor said claimed not parallel. what is not parallel then?

is it because

"have been prescribed" <--- still prescribed, present perfect
"were taken off a drug" <-- simple past, perhaps they got back on the drug later? have been taken off would indicate they are still off

thanks

[RonPurewal]

i still don't understand why D is wrong outside of just akwardness

D -- when they have, for example, been prescribed too low a drug dosage for it to be effective, or were

have been and were seem to be parallel on the surface, two people including an instructor said claimed not parallel. what is not parallel then?

is it because

"have been prescribed" <--- still prescribed, present perfect
"were taken off a drug" <-- simple past, perhaps they got back on the drug later? have been taken off would indicate they are still off

thanks

these are two possible causes of the same thing, considered in the same timeframe, so they should appear in the same tense.
when things are simple, it's imperative to keep them simple.

[messi10]

Can B and C be eliminated for the use of "being" as a modifier? I know being is not always wrong but is it wrong when used as a modifier?

Thanks

[jlucero]

Not always as a modifier, but in this and most cases, yes.

Being 15, I made some dumb mistakes.

I believe (although I'm not 100% sure here), the difference is that the above example is an adjective (noun modifier), while the attempt in B/C is to be an adverb (verb modifier). There's a lot of other issues with B/C, so this would be further down on my list of things to note.

Edit: I'd take Ron's advice here from another post: avoid starting modifiers with "being" post67403.html#p67403

[messi10]

Great, thanks Joe

[jlucero]

Sure thing.

[chwera58]

i still don't understand why D is wrong outside of just akwardness

........
thanks

these are two possible causes of the same thing, considered in the same timeframe, so they should appear in the same tense.
when things are simple, it's imperative to keep them simple.

Hi, Ron, appreciate greatly if you can answer my following question:

1) Please kindly correct me if I am wrong: put "have been" & "were" in parallel does not by themselves deem illegitimate usage, it is the context that these two causes can be constructed in the same present perfect tense makes choice D less favorable?

2) Is this example correct?: I am too fat because I have been eating too much junk food (I am still eating junk food) and was lazy to exercise (but I started exercising two months ago).

Thank you very much Ron.

[Suapplle]

Hi,instructors,I am confused about parallelism.
whether "have been" and "am/is/are" can parallel or not?