Quick Answer
A fragment is a group of words that lacks an independent clause, failing to express a complete thought. On the Digital SAT, fragments are frequently tested within the Reading and Writing section under 'Boundaries' questions. Typically, these appear 2–4 times per exam, requiring students to identify and correct incomplete sentence structures.
A fragment is a grammatically incomplete sentence that lacks a subject, a finite verb, or a main independent clause. In standard English, a sentence must contain at least one independent clause to be punctuated with a terminal mark like a period or semicolon.
Question: The architect designed the skyscraper to be eco-friendly. Incorporating solar panels and rainwater harvesting systems into the final blueprint. Choice A: eco-friendly. Incorporating Choice B: eco-friendly, incorporating Solution: Choice B is correct. The phrase starting with 'incorporating' lacks a finite verb and subject, making it a fragment if punctuated with a period. A comma correctly joins the participial phrase to the independent clause.
Confusing long phrases for sentences: Students often assume a long string of words is a complete sentence even if it lacks a main verb.
Misidentifying participles: Students may mistake '-ing' verbs (participles) for finite verbs, failing to realize an auxiliary verb like 'is' or 'was' is missing.
Dependent clause traps: Students often treat clauses starting with subordinating conjunctions (like 'Because' or 'Although') as complete sentences when they stand alone.
Students targeting 750+ should know that the SAT often masks fragments by placing a lengthy appositive or prepositional phrase between the subject and the verb, or by using a relative pronoun like 'which' to create a dependent clause that looks like a main clause.
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.
Dependent Clause
A **dependent clause** is a group of words containing a subject and verb that cannot stand alone as a sentence. On the Digital SAT, these frequently appear in the Reading and Writing section, particularly within 'Standard English Conventions' questions where students must correctly punctuate the relationship between clauses to avoid fragments.
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.
Run-On Sentence
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 fragment on the SAT is an incomplete sentence that is punctuated as if it were complete. It typically lacks a subject, a verb, or an independent clause. In the Reading and Writing section, identifying fragments is crucial for 'Boundaries' questions, where you must ensure every sentence separated by a period or semicolon is a complete independent thought.
To identify a fragment, check if the word group has a subject and a finite verb that can stand alone. Read the sentence in isolation; if it starts with a subordinating conjunction (like 'Since' or 'While') or a relative pronoun (like 'Which') without an attached main clause, it is likely a fragment. Ensure the verb is not just a participle (like 'running').
A fragment is an incomplete sentence lacking an independent clause, whereas a comma splice occurs when two complete independent clauses are joined only by a comma. While a fragment needs more information or a structural change to be complete, a comma splice requires a stronger separator, such as a semicolon, a period, or a comma plus a coordinating conjunction.
Approximately 2 to 4 questions per Digital SAT exam specifically test sentence boundaries, which include fragments and run-on sentences. These questions typically appear in the Reading and Writing modules. While the exact number varies by test form, mastering fragments is essential for a high score in the Standard English Conventions category of the exam.
