Drug

[aroon7]

If a drug that is already on the market has the potential to help adults and children who have the same disease, or if it is widely used in children and absence of labeling seems dangerous, the FDA can require that the drug undergo pediatric study

that the drug undergo
that the drug undergoes
that the drug is to undergo
the drug undergoing
the drug to have to undergo

I chose B, but the answer is A...
could someone please help me in understanding why we use plural verb "undergo" instead of "undergoes"?

Thanks!

[StaceyKoprince]

What we're actually using here is the subjunctive, which is constructed by taking the infinitive from of a verb and dropping the "to" from the front: so "to undergo" becomes "undergo." We're not using a conjugated form of the verb.

When you "require that ..." or "recommend that ..." or otherwise indicate something that you think "should" happen but you don't know whether it really will happen, then you use subjunctive (there is a list of verbs and setups that commonly take subjunctive in our SC strategy guide, if you have access to that).

[sandeep.19+man]

What is wrong with C?

Thank you

[mschwrtz]

Just as Stacey explained, you want to use what is sometimes called the "bare form" of the verb. C does not use that form. C use a tensed or conjugated verb.

[mschwrtz]

Oh, one other thing, if you're going to read up on subjunctive moods, whether in our SC Strategy Guide or elsewhere, this sentence is in what is called the command subjunctive, rather than the hypothetical subjunctive.

This is a quite rare problem, but compare to Verbal Review question #90.

[eggpain24]

HI, instructors~

I think the correct subjunctive mood can be either of these：
1. require that
2. require ... to do

therefore，in choice E

is it mainly wrong for saying “have to”，which not only violate the correct idiomatic usage of “require ... to do"

but also commit redundancy, because "have to" is similar to "require" in term of meaning?

thanks !

[RonPurewal]

HI, instructors~

I think the correct subjunctive mood can be either of these：
1. require that
2. require ... to do

therefore，in choice E

is it mainly wrong for saying “have to”，which not only violate the correct idiomatic usage of “require ... to do"

but also commit redundancy, because "have to" is similar to "require" in term of meaning?

thanks !

Technically, there's no problem of form. "To have to ..." still has the form "to ____".
But, "have to" means that something is required. So, redundant.

[RonPurewal]

Also, in general, "require X to do Y" is only used when X is a person.

This is not going to be the only issue with an official answer choice—it's much too subtle—but, in general, it's a thing.

[eggpain24]

Also, in general, "require X to do Y" is only used when X is a person.

This is not going to be the only issue with an official answer choice—it's much too subtle—but, in general, it's a thing.

thanks for your insight！
Ron