Select the sentence that does NOT have an agreement error.
a. The thumb was initially casted for 3 days and then has been splinted for 3 weeks.
b. The thumb was initially casted for 3 days and then splinted for 3 weeks.
c. The thumb was initially casted for 3 days and then had been splinted for 3 weeks.
ANSWER:
b.
Right again!
This, too, has nothing to do with agreement between subject and verb -- it has everything to do with concise wording and sequence of verb tenses.
To identify the sentence that does NOT have an agreement error, we need to look for consistency in verb tense. In this case, we have a past tense verb ("casted") and a present perfect verb ("has been splinted" or "had been splinted").
Sentence (a) "The thumb was initially casted for 3 days and then has been splinted for 3 weeks" has an agreement error because it combines past tense ("was casted") with present perfect ("has been splinted").
Sentence (c) "The thumb was initially casted for 3 days and then had been splinted for 3 weeks" also has an agreement error because it combines past tense ("was casted") with past perfect ("had been splinted").
Sentence (b) "The thumb was initially casted for 3 days and then splinted for 3 weeks" is the correct sentence without an agreement error. It maintains consistency by using past tense throughout.