OFFICIAL EXPLANATIONProject SC Butler: Sentence Correction (SC1)
THE PROMPTQuote:
The starling, a bird mentioned in one of Shakespeare’s plays, was first introduced in the United States in 1890 and has since become a significant pest species.
• Remove the nonessential modifier (the appositive that follows
starling):
The starling . . . was first introduced in the United States in 1890 and has since become a significant pest species.• Glance at the answer choices. Which word in that shortened sentence is the most important?
→
Since. → This word is a verb tense marker, just as is the phrase
by the time (try
this question, here, and see my answer,
here.
• In this sentence,
since means
between a specific past time and the present.→ the sentence describes an action that began in the past and that is continuing into the future.
→ to talk about that kind of time period, we use
has/have + past participle (verbED)
→ that verb tense is called
present perfect Quote:
(A) was first introduced in the United States in 1890 and has since become
• I see no errors
•
the starling, singular, is paired with
was, also singular
• the verb tense,
has [since] become, is correct
→ the action began in the past and continues into the present
KEEP
Quote:
(B) were first introduced in the United States in 1890 and has since become
• The starling, singular, cannot be paired with the plural verb
were• even if you can't quite figure out whether
the starling is singular or plural, it can't be both in a compound predicate (one subject does two things)
→
were is plural whereas
has [since] become is singular
ELIMINATE B
(C) was first introduced to the United States in 1890 and would since become• wrong verb tense; there is no such thing as
would since do anything
• because of the word
since and the context, as I noted, we need
has since becomeELIMINATE C
Quote:
(D) was first introduced to the United States in 1890 and since became
• wrong verb tense; there is no such thing as
since became→ we need the past participle (verbED), not simple past
→ past perfect requires HAS/HAVE + ___ED (verbED)—that is, has since
become• the verbs do not have to be parallel (
was and
became are both simple past, but this answer is 100% wrong)
→ when one subject does two (or more) things, we call the part with the verbs a
compound predicate in which verb tenses can shift.
ELIMINATE D
Quote:
(E) were first introduced to the United States in 1890 and since has become
• singular subject starling does not agree with plural verb
wereELIMINATE E
The answer is A.COMMENTSAkp880 and
AyushGogia21 , welcome to SC Butler.
Word of the day:
mellifluous.
Explanation is key.
Most of these answers give very good explanations. Nice work.