PRNDL
I had learnt that there are certain types of structures for If-then clauses.
For example, if we have a "If" followed by "simple present" then our "then" will be followed by a "simple present or simple future".
similarly-> If+simple past is followed by then+simple past or then+would verb.
Is this true ? if yes then why does this question not follow this structure ?
Good question!
We are given a past tense verb in the non-underlined "if" clause ("if the corporation benefited"). If we're being lazy, we might decide, without really using our brains, that we NEED a past tense verb in the corresponding "then" clause (which in this case comes before the "if" part -- and if you're thinking, "Where the heck is the 'then' part?", check out
this post).
But notice that all five choices use a present tense verb in the "then" part!
(A) a corporation commits
(B) a corporation is committing
(C) corporations commit a crime
(D) corporations commit
(E) the corporation {...} commits a crime
This tells us that having a past tense verb in the "if" clauses MUST be okay. The question-writers probably recognized that this shift in tenses would cause confusion, so they gave us a break and didn't really give us a choice.
The shift in tenses makes sense when we think about the alternative: "a corporation commits a crime whenever one of its employees commits a crime, if the employee
acts..."
- The first part is a general statement: whenever one of a corporation's employees commits a crime, that corporation commits a crime.
- The use of the simple present for the "if" part seems to suggest that the "if" part is a general statement as well. Does that mean that the corporation commits a crime only if the employee generally acts within the scope of his or her authority?
- The shift to the past tense tells the reader that we're moving from a general statement to a specific statement about a hypothetical employee who has committed a hypothetical crime. This tense change might FEEL unexpected, but it actually helps clarify the intended meaning.
That's a really subtle point, and the good news is that the question-writers are NOT asking us to worry about this. So don't take this as an invitation to update your "if-then" algorithm with new rules for shifting tenses. Instead, take it as a reminder that you have to use your brain when thinking about grammar -- GMAT SC requires you to think really hard about meaning and context, and trying to circumvent that hard work with a list of memorized rules often backfires.
I hope that helps!