Manicchamp Wrote:Answer B is wrong because the statement says "In 1987" and therefore, an increease in the number of citizens needs to be conveyed in the past tense and not the present tense. Hence, In 1987, X "has jumped" is simply wrong.
yeah, i'd say this is the main issue, too. the PRESENT PERFECT must be used for events/trends that are
continuing into the present, or at least
still relevant to the present.** since we're citing a statistic that is limited to 1987, and there's nothing to indicate that the statistic has continued relevance today, the present perfect is inappropriate.
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**the idea of RELEVANCE to the present here is extremely important; the event doesn't literally have to
continue into the present.
for instance:
i have visited finland --> i don't have to still be there; in fact, even if i visited fifty years ago, i can still say this,
provided that the fact has some relevance to the present or to the current discussion (i.e., i still retain the experiences from that visit --> therefore use the present perfect "
have visited"). this is the way i'd say it if i were talking about finland with friends, and happened to bring up the fact that i've been there.
i visited finland --> no direct relevance to the present; this is the way i'd say it if i were, say, relating the itinerary of a european trip i took at some point in the past.
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"declaring" is better than "who declared", because the former gives the explicit idea that the people were declaring themselves bankrupt
at the time. the latter version doesn't seem 100% wrong, but it seems to leave the door open for people who had
already declared themselves bankrupt prior to '87.
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finally, and importantly,
if you are a native speaker, your EAR should be remarkably good at dictating proper verb tense. i'd bet a fair amonut of money that a strong majority of native english speakers seeing this problem would instinctively react negatively to "has jumped", even if they couldn't put a finger on exactly why.
this is especially notable because, for most other criteria on which sentence correction problems are predicated, the ear is a
horrible judge. for instance,
nobody uses formally correct modifiers all the time in spoken language; many modifiers, such as appositive and participial modifers, sound absolutely absurd when spoken out loud. with verb tense, though, we are surprisingly good when speaking.
if you're not a native speaker, you'll just have to learn the verb tenses systematically.