Quick Answer
A run-on sentence occurs when two independent clauses are fused without proper punctuation or conjunctions. On the Digital SAT, these errors appear frequently within the Reading and Writing section. Mastering this concept is crucial, as approximately 3 to 5 "Boundaries" questions typically test your ability to fix these errors.
A run-on sentence is a grammatical error that occurs when two or more independent clauses are joined without a semicolon, colon, or a comma plus a coordinating conjunction (FANBOYS). Grammatically, this is expressed as [Independent Clause] + [Independent Clause] without a valid separator.
Question: The telescope captured distant nebulae it provided new data for the research team. Which choice corrects the run-on? A) nebulae it B) nebulae, it C) nebulae; it D) nebulae, and. Solution: C is correct. The sentence contains two independent clauses. A semicolon (;) correctly separates them. Choice B creates a comma splice, and Choice D is missing the conjunction after the comma.
Mistake 1: Assuming that any long sentence is a run-on, whereas length does not determine grammatical correctness.
Mistake 2: Using only a comma to fix the error, which incorrectly results in a comma splice.
Mistake 3: Treating conjunctive adverbs like 'however' or 'therefore' as coordinating conjunctions and failing to use a semicolon before them.
Students targeting 750+ should know that the SAT often hides run-on sentences by inserting long descriptive phrases or parenthetical elements between the two independent clauses to distract you from the missing boundary.
Comma Splice
A comma splice occurs when two independent clauses are joined by only a comma without a conjunction. On the Digital SAT, this error is frequently tested within the 'Boundaries' question type in the Reading and Writing section. Students must identify these mistakes to ensure sentences are punctuated according to Standard English Conventions.
Coordinating Conjunction
A coordinating conjunction is a word used to connect words, phrases, or independent clauses on the Digital SAT. These seven words—for, and, nor, but, or, yet, so—typically appear in the Reading and Writing section under Standard English Conventions questions, where they are essential for fixing run-on sentences and comma splices.
Independent Clause
An independent clause is a grammatical unit that contains a subject and a verb and expresses a complete thought. On the Digital SAT, this concept is frequently tested in the Reading and Writing section, particularly within Standard English Conventions questions. Students must often distinguish between independent and dependent clauses to avoid punctuation errors like comma splices.
A run-on sentence on the SAT is a structural error where two independent clauses are joined without appropriate punctuation or a coordinating conjunction. These errors are tested in the Reading and Writing section, specifically within 'Boundaries' questions. Identifying these is essential for maintaining the grammatical integrity of a passage and ensures that separate ideas are clearly distinguished for the reader.
To identify a run-on sentence, determine if the sentence contains two or more independent clauses that can stand alone. If these clauses are fused together without a period, semicolon, or a comma followed by a conjunction (for, and, nor, but, or, yet, so), the sentence is a run-on. Check each part of the sentence for a subject and a corresponding verb.
A run-on sentence, or fused sentence, contains no punctuation at all between independent clauses, while a comma splice incorrectly uses only a comma to join them. On the Digital SAT, both are considered major grammatical errors under the 'Boundaries' umbrella. Both require the addition of a semicolon, a period, or a coordinating conjunction to be corrected properly.
The Digital SAT typically includes approximately 3 to 5 questions per test that specifically focus on clause boundaries and run-on sentences. These are categorized under Standard English Conventions. While the exact count may vary between Module 1 and Module 2, these concepts are consistently tested, making them a high-priority topic for students looking to improve their verbal score.
