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02 Jun 2022, 23:01
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
65% (01:06) correct
35%
(01:21)
wrong
based on 218
sessions
History
Date
Time
Result
Not Attempted Yet
Over the course of three decades spent as a field veterinarian with the National Forest Service, Dr. Lynn treats several large mammals escaping from traps and snares set by poachers.
A) Dr. Lynn treats several large mammals escaping from traps and snares set by poachers
B) Dr. Lynn treated several large mammals escaping from traps and snares set by poachers
C) Dr. Lynn has treated several large mammals that escaped from traps and snares set by poachers
D) Dr. Lynn has treated several large mammals who escaped from traps and snares set by poachers
E) Dr. Lynn has been treating several large mammals who escaped from traps and snares set by poachers
02 Jun 2022, 23:04
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Official Explanation
THE PROMPT
Quote:
• TAKEAWAY: verb tense trigger
→ Time periods such as "over the course of three decades" trigger certain constructions.
First and obviously, future tense is out.
Second, simple present tense is out.
→ Wrong: Over the course of a decade, the Department of Homeland Security warns that domestic right-wing terrorists pose the greatest national security thread to the U.S.
We need a verb tense that will connect the past to the present (or to the very recent past).
All "perfect" tenses are used to make connections in time—for example, to "bridge" the past and the present.
Why are they called "perfect" tenses? (I'm leaving out the progressive or continuous tenses for a moment.)
The action has been "perfected"—finished, completed, achieved.
The "perfect" grammatical aspect is essentially that something is "done."
At the same time, simple past will not work: it's a discrete moment in time.
Present perfect = HAS/HAVE + past participle (verbED)
→ He has harbored dreams of emulating tsars and of empire building for the last 30 years.
→ He has been called "the Butcher of Aleppo" since 2015.
You can read about present perfect progressive here.
THE OPTIONS
Quote:
• Verb error
We do not use present tense "treats" to describe 30 years' of veterinarian work that started in the past.
In addition, while simple present can describe a general truth, she will not always treat such animals.
ELIMINATE A
Quote:
• Tough call. The sentence is grammatical but includes a weird modifier: mammals escaping from traps and snares
Mammals escaping is a reduced relative clause.
→ Not-reduced relative clause: . . . mammals that were escaping from traps and snares
To reduce (shorten) this clause (you see this all the time but may not realize it):
1) drop the relative pronoun (that)
2 ) drop the "to be" verb (were)
3) keep the adjective (escaping)
→ Now, was the vet always treating mammals that were escaping traps and shares set by poachers?
How was she treating them if they were .... escaping?
Something about this construction is not exactly wrong, but from a usage (diction) standpoint, it seems a little strange.
KEEP, but look for a better answer.
Quote:
• I see no errors
• "has treated" fits properly with "over the course of the last three decades"
• [i]mammals that escaped is more logical that "mammals escaping."
She would not [first or mostly] treat the escaping animals. SHe would help them escape, then treat them . . . in which case, we end up with "mammals that escaped."
ELIMINATE B
KEEP C
Quote:
• WHO is used only for human beings (and possibly beloved pets, though GMAC has not gone that far yet)
→ to talk about animals, use that (mammals that escaped . . .)
ELIMINATE D
Quote:
• WHO is used only for human beings (and possibly beloved pets, though GMAC has not gone that far yet)
→ to talk about animals, use that (mammals that escaped . . .)
Same problem as that in D.
ELIMINATE E
The best answer is C.
COMMENTS
Kudos to all for nice work.
02 Jun 2022, 23:24
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My answer is (C). It took me 01:04.
"Over the course of three decades": Perfect tense is appropriate to indicate that an action happens / happened over the course of a longer period of time.
(A) "treating several large mammals" is an concrete action that took place in the past. We can eliminate simple present case.
(B) Because of "over the course of three decades", I opt to choose (C) over (B). If the sentence were to start with "Last year, Dr....", simple past tense would be correct.
(C) Perfect tense makes more sense to work with "Over the course of three decades".
(DE) "Who" can only be used to modify humans.
"Over the course of three decades": Perfect tense is appropriate to indicate that an action happens / happened over the course of a longer period of time.
(A) "treating several large mammals" is an concrete action that took place in the past. We can eliminate simple present case.
(B) Because of "over the course of three decades", I opt to choose (C) over (B). If the sentence were to start with "Last year, Dr....", simple past tense would be correct.
(C) Perfect tense makes more sense to work with "Over the course of three decades".
(DE) "Who" can only be used to modify humans.
