EXPLANATION
E12. Identify the sentence that correctly uses a nonrestrictive clause:
a) The boy who is wearing a red shirt is my friend.
b) The boy, who is wearing a red shirt, is my friend.
c) The boy who is wearing a red shirt, is my friend.
d) The boy who is wearing a red shirt is my friend.
ANSWER: b) The boy, who is wearing a red shirt, is my friend.
EXPLANATION:
The sentence that correctly uses a nonrestrictive clause is:
b) The boy, who is wearing a red shirt, is my friend.
A nonrestrictive clause provides additional information about a noun or pronoun in the main clause but is not essential to identifying or understanding the noun or pronoun. Nonrestrictive clauses are set off by commas to indicate that the information they provide is supplementary.
In this case, the nonrestrictive clause "who is wearing a red shirt" provides additional information about "the boy" but does not change the essential meaning of the sentence. The use of commas in option b correctly indicates that the clause is nonrestrictive, allowing for a pause in the reading and emphasizing the supplementary nature of the information.
