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Zorluk: OrtaSubject-Verb Agreement

In the field of dendrochronology, researchers analyze the patterns of annual growth rings in trees to reconstruct past climate variations and date ancient wooden structures. The precise synchronization of tree-ring sequences from wood samples collected across different geographical regions ______ scientists to construct a continuous chronological record stretching back thousands of years.

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

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

Cevap

allows
The singular verb 'allows' matches the singular subject 'synchronization'. Although plural nouns like 'sequences', 'samples', and 'regions' appear in the intervening prepositional phrases, they modify the main subject and do not alter its singular number.

Adım Adım Çözüm

1
Identify the subject of the sentence.
The subject is the singular noun 'synchronization'.
Finding the head noun of the subject phrase is necessary to determine if the verb should be singular or plural.
2
Analyze the intervening phrases.
The phrase 'of tree-ring sequences from wood samples collected across different geographical regions' contains plural nouns ('sequences', 'samples', 'regions') but functions as a modifier and does not affect the grammatical number of the subject.
Distinguishing the subject from its modifiers prevents subject-verb agreement errors caused by proximity.
3
Select the verb form that agrees with the singular subject and completes the sentence.
The singular verb 'allows' correctly agrees with 'synchronization' and forms a complete independent clause.
A singular subject requires a singular verb in the third person present tense.

Anahtar Kavram

Subject-Verb Agreement with Intervening Phrases
Bu soruyu puanla

Konular

Subject-Verb Agreement

Bu konudan daha fazla soru