What punctuation error is most common on standardized tests?

What punctuation error is most common on standardized tests?

• A. Run-on sentence.
• B. Fragment.
• C. Apostrophe misuse.
• D. Comma splice.

Answer: (D)

Recognizing how to link two independent clauses with proper punctuation is what this item tests. A comma splice happens when two complete sentences are joined only with a comma, which is a very common mistake on standardized tests. People slip into this because a simple comma feels like a natural pause, but grammar requires a stronger connection: either a semicolon or a period, or a comma followed by a coordinating conjunction (for, and, nor, but, or, yet, so). The reason this error is so prevalent on tests is that two ideas in one sentence are common in writing, and the simplest fix—adding just a comma—does not actually join the clauses correctly. By recognizing and correcting comma splices, you show you know how to structure sentences for clear meaning.

Recognizing how to link two independent clauses with proper punctuation is what this item tests. A comma splice happens when two complete sentences are joined only with a comma, which is a very common mistake on standardized tests. People slip into this because a simple comma feels like a natural pause, but grammar requires a stronger connection: either a semicolon or a period, or a comma followed by a coordinating conjunction (for, and, nor, but, or, yet, so). The reason this error is so prevalent on tests is that two ideas in one sentence are common in writing, and the simplest fix—adding just a comma—does not actually join the clauses correctly. By recognizing and correcting comma splices, you show you know how to structure sentences for clear meaning.