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Soru

Zorluk: ZorSubject-Verb Agreement

In the high-altitude alpine ecosystems of the Pamir Mountains, lichenometry serves as a critical tool for dating glacial retreats and environmental shifts. Specifically, the slow growth rate of crustose lichens, along with their high sensitivity to minute fluctuations in atmospheric chemistry, ______ researchers to reconstruct historical pollution patterns with remarkable chronological precision.

Which choice completes the text so that it conforms to the conventions of Standard English?

  1. A
    allow
  2. allowsCevap
  3. C
    allowing
  4. D
    have allowed

Cevap

allows
The singular present-tense verb 'allows' correctly agrees with the singular subject 'rate'. The intervening prepositional phrase ('of crustose lichens') and additive phrase ('along with their high sensitivity...') do not affect the grammatical number of the subject.

Adım Adım Çözüm

1
Identify the subject of the clause containing the blank.
The subject is the singular noun 'rate'.
Finding the true subject is necessary to determine whether a singular or plural verb is required.
2
Analyze the intervening phrases between the subject and the verb.
The phrases 'of crustose lichens' and 'along with their high sensitivity...' are modifying elements that do not change the number of the subject.
Distinguishing the subject from modifying prepositional or additive phrases prevents errors caused by nearby plural nouns like 'lichens' or 'fluctuations'.
3
Select the verb form that agrees with the singular subject and fits the tense of the sentence.
The singular, present-tense verb 'allows' correctly completes the sentence.
A singular subject requires a singular verb form to maintain subject-verb agreement.

Anahtar Kavram

Subject-Verb Agreement
Bu soruyu puanla

Konular

Subject-Verb Agreement

Bu konudan daha fazla soru