Question

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rule 8- non essentials
questions answered: 1
add or remove punctuation, if necessary, from the sentence below.
katy bought the mystery novel, that she had been longing to read, at the book sale.

Explanation:

The clause "that she had been longing to read" is a restrictive essential clause—it defines which mystery novel Katy bought, so it should not be set off by commas. We need to remove the commas around this clause. The phrase "at the book sale" is a non-essential adverbial phrase that can remain set off by a comma, or we can adjust for flow; the key fix is removing commas around the restrictive relative clause.

Answer:

Katy bought the mystery novel that she had been longing to read, at the book sale.

Note: For even tighter flow, it can also be written as "Katy bought the mystery novel that she had been longing to read at the book sale," but the core correction is removing the commas around the restrictive "that" clause.