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Zorluk: OrtaPunctuation of Nonessential Elements

Read the passage below. Which punctuation mark should be placed in the blank to correctly set off the nonessential element?

Cevap:Although pulsars are now recognized as vital tools for studying the cosmos, their discovery in 1967 was initially met with intense skepticism from the scientific establishment. Astrophysicist Jocelyn Bell Burnell first identified these rapidly rotating neutron stars, which emit regular beams of radio waves【,】while analyzing massive amounts of data from a newly constructed radio telescope at Cambridge University.

Cevap

A comma (`,`) must be placed in the blank to correctly set off the nonessential relative clause.
A comma is correct because it matches the opening comma after the word 'stars' that introduces the nonessential relative clause 'which emit regular beams of radio waves.' In Standard English, nonessential elements must be set off with a consistent pair of matching punctuation marks.

Adım Adım Çözüm

1
Identify the nonessential relative clause within the sentence.
The clause 'which emit regular beams of radio waves' is a nonessential relative clause that modifies the noun phrase 'these rapidly rotating neutron stars' by adding descriptive detail that is not grammatically essential to the main sentence.
Recognizing nonessential elements is necessary to apply rules of punctuation symmetry.
2
Examine the punctuation mark that introduces the nonessential clause.
The clause begins with a comma after the word 'stars.'
Nonessential elements must be set off from the rest of the sentence by a matching pair of punctuation marks.
3
Determine the appropriate closing punctuation mark.
Since the nonessential relative clause is introduced with a comma, it must close with a comma to maintain grammatical symmetry before continuing with the rest of the independent clause.
Using mismatched punctuation (such as a comma and a dash) creates an ungrammatical shift.

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Punctuation of Nonessential Elements
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Punctuation of Nonessential Elements

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