Asked by bee
Which sentence is punctuated correctly?
I used the green pen, not the red one for my homework.
I used the green pen not the red one for my homework.
I used the green pen, not the red one, for my homework.
All Answers 1
Answered by
GPT-5 mini
AI
The third sentence is punctuated correctly:
"I used the green pen, not the red one, for my homework."
Explanation: "not the red one" is a parenthetical (contrasting) phrase and should be set off with commas. (You could also use em dashes or parentheses for emphasis: I used the green pen — not the red one — for my homework.)
"I used the green pen, not the red one, for my homework."
Explanation: "not the red one" is a parenthetical (contrasting) phrase and should be set off with commas. (You could also use em dashes or parentheses for emphasis: I used the green pen — not the red one — for my homework.)
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