GED Reasoning Through Language Arts Language Grammar Sentence Structure Complete Sentences vs Fragments vs Run-ons

What Is This?

A complete sentence is a unit of language that expresses a complete thought, has a subject and a predicate, and can stand alone as a separate sentence. A fragment or run-on sentence, on the other hand, lacks a complete thought or has multiple thoughts without proper conjunction. This topic appears in exams to test your understanding of sentence structure and your ability to identify and correct errors.

Why It Matters

This topic is commonly tested in English language proficiency exams, such as TOEFL, IELTS, and GRE. It appears frequently, carrying around 10-20% of the total marks. The examiner is testing your ability to analyze sentence structure, identify errors, and apply grammatical rules to correct them. You must demonstrate a deep understanding of sentence structure and grammatical concepts to excel in this topic.

Core Concepts

To master this topic, you must own the following foundational ideas:

• A complete sentence has a subject and a predicate, and can stand alone as a separate sentence.
• A fragment is a group of words that lacks a complete thought or a subject and predicate.
• A run-on sentence is a sentence that contains two or more independent clauses without proper conjunction.

You must also understand the distinction between independent clauses, which can stand alone as separate sentences, and dependent clauses, which cannot.

Prerequisites

Before tackling this topic, you must already understand:

• Basic sentence structure, including subjects, predicates, and clauses.
• Grammatical concepts, such as verb tenses, subject-verb agreement, and pronoun usage.
• The difference between simple, compound, and complex sentences.

If you are missing these prerequisites, you may struggle to understand the concepts and rules presented in this topic.

The Rule-Book (How It Works)

The primary rule is:

• A complete sentence must have a subject and a predicate, and can stand alone as a separate sentence.

Sub-rules and exceptions include:

• A simple sentence has a single independent clause.
• A compound sentence contains two or more independent clauses joined by a conjunction.
• A complex sentence contains an independent clause and one or more dependent clauses.

Signal words, such as however, in addition, and nevertheless, can indicate the relationship between clauses.

Exam / Job / Audit Weighting

Frequency: 20-30% Difficulty Rating: Intermediate Question Type or Real-World Task Type: Identifying and correcting sentence errors, analyzing sentence structure, and applying grammatical rules.

Difficulty Level

Intermediate

Must-Know Rules, Formulas, Standards, or Principles

The three most important rules for this topic are:

1. A complete sentence must have a subject and a predicate.
2. A fragment is a group of words that lacks a complete thought or a subject and predicate.
3. A run-on sentence is a sentence that contains two or more independent clauses without proper conjunction.

Worked Examples (Step-by-Step)

Example 1: Easy Question: Identify the type of sentence: "I went to the store." Reasoning: This sentence has a single independent clause, so it is a simple sentence.
Answer: Simple sentence Key rule applied: A simple sentence has a single independent clause.

Example 2: Medium Question: Identify the error in the following sentence: "I went to the store, my friend went to the movies and we met up later." Reasoning: This sentence contains two independent clauses without proper conjunction, so it is a run-on sentence.
Answer: Run-on sentence Key rule applied: A run-on sentence is a sentence that contains two or more independent clauses without proper conjunction.

Example 3: Hard Question: Identify the type of sentence: "Although I was tired, I finished the project on time." Reasoning: This sentence contains an independent clause and a dependent clause, so it is a complex sentence.
Answer: Complex sentence Key rule applied: A complex sentence contains an independent clause and one or more dependent clauses.

Common Exam Traps & Mistakes

Mistake 1: Confusing a fragment with a dependent clause.
Question: Identify the type of sentence: "To the store." Wrong answer: Dependent clause Why it looks right: The phrase "to the store" is a prepositional phrase, which can function as a dependent clause.
Correct approach: A fragment is a group of words that lacks a complete thought or a subject and predicate.

Mistake 2: Confusing a run-on sentence with a compound sentence.
Question: Identify the type of sentence: "I went to the store, my friend went to the movies." Wrong answer: Compound sentence Why it looks right: The sentence contains two independent clauses joined by a conjunction.
Correct approach: A run-on sentence is a sentence that contains two or more independent clauses without proper conjunction.

Mistake 3: Failing to identify a dependent clause.
Question: Identify the type of sentence: "Because I was tired, I went to bed early." Wrong answer: Independent clause Why it looks right: The phrase "because I was tired" is a dependent clause, but it is not clearly marked.
Correct approach: A dependent clause is a clause that cannot stand alone as a separate sentence.

Mistake 4: Confusing a complex sentence with a compound sentence.
Question: Identify the type of sentence: "I went to the store, and my friend went to the movies." Wrong answer: Complex sentence Why it looks right: The sentence contains two independent clauses joined by a conjunction.
Correct approach: A complex sentence contains an independent clause and one or more dependent clauses.

Mistake 5: Failing to identify a fragment.
Question: Identify the type of sentence: "I went to the store." Wrong answer: Fragment Why it looks right: The sentence lacks a clear subject and predicate.
Correct approach: A fragment is a group of words that lacks a complete thought or a subject and predicate.

Shortcut Strategies & Exam Hacks

To solve questions faster and more accurately, use the following strategies:

• Use a sentence diagram: Visualize the sentence structure to identify independent and dependent clauses.
• Look for signal words: Identify words like however, in addition, and nevertheless to indicate the relationship between clauses.
• Check for fragments: Look for groups of words that lack a complete thought or a subject and predicate.
• Check for run-on sentences: Look for sentences that contain two or more independent clauses without proper conjunction.

Question-Type Taxonomy

The following are the distinct question formats this topic appears in across different exams:

Practice Set (MCQs)

1. Question: Identify the type of sentence: "I went to the store."

   
   
   • A) Simple sentence
   • B) Compound sentence
   • C) Complex sentence
   • D) Fragment
   • Correct Answer: A) Simple sentence
   • Explanation: A simple sentence has a single independent clause.
   • Why the Distractors Are Tempting: B) Compound sentence is tempting because the sentence has a single independent clause, but it could also be a compound sentence if it had two independent clauses. C) Complex sentence is tempting because the sentence has a single independent clause, but it could also be a complex sentence if it had a dependent clause. D) Fragment is tempting because the sentence lacks a clear subject and predicate, but it is not a fragment because it has a single independent clause.

2. Question: Identify the error in the following sentence: "I went to the store, my friend went to the movies and we met up later."

   
   
   • A) Run-on sentence
   • B) Fragment
   • C) Complex sentence
   • D) Simple sentence
   • Correct Answer: A) Run-on sentence
   • Explanation: A run-on sentence is a sentence that contains two or more independent clauses without proper conjunction.
   • Why the Distractors Are Tempting: B) Fragment is tempting because the sentence lacks a clear subject and predicate, but it is not a fragment because it has two independent clauses. C) Complex sentence is tempting because the sentence has two independent clauses, but it is not a complex sentence because it lacks a dependent clause. D) Simple sentence is tempting because the sentence has a single independent clause, but it is not a simple sentence because it has two independent clauses.

3. Question: Identify the type of sentence: "Although I was tired, I finished the project on time."

   
   
   • A) Simple sentence
   • B) Compound sentence
   • C) Complex sentence
   • D) Fragment
   • Correct Answer: C) Complex sentence
   • Explanation: A complex sentence contains an independent clause and one or more dependent clauses.
   • Why the Distractors Are Tempting: A) Simple sentence is tempting because the sentence has a single independent clause, but it is not a simple sentence because it has a dependent clause. B) Compound sentence is tempting because the sentence has two independent clauses, but it is not a compound sentence because it lacks a conjunction. D) Fragment is tempting because the sentence lacks a clear subject and predicate, but it is not a fragment because it has a single independent clause.

4. Question: Identify the error in the following sentence: "I went to the store, my friend went to the movies."

   
   
   • A) Run-on sentence
   • B) Fragment
   • C) Complex sentence
   • D) Simple sentence
   • Correct Answer: A) Run-on sentence
   • Explanation: A run-on sentence is a sentence that contains two or more independent clauses without proper conjunction.
   • Why the Distractors Are Tempting: B) Fragment is tempting because the sentence lacks a clear subject and predicate, but it is not a fragment because it has two independent clauses. C) Complex sentence is tempting because the sentence has two independent clauses, but it is not a complex sentence because it lacks a dependent clause. D) Simple sentence is tempting because the sentence has a single independent clause, but it is not a simple sentence because it has two independent clauses.

5. Question: Identify the type of sentence: "To the store."

   
   
   • A) Simple sentence
   • B) Compound sentence
   • C) Complex sentence
   • D) Fragment
   • Correct Answer: D) Fragment
   • Explanation: A fragment is a group of words that lacks a complete thought or a subject and predicate.
   • Why the Distractors Are Tempting: A) Simple sentence is tempting because the phrase "to the store" is a prepositional phrase, but it is not a simple sentence because it lacks a subject and predicate. B) Compound sentence is tempting because the phrase "to the store" is a prepositional phrase, but it is not a compound sentence because it lacks an independent clause. C) Complex sentence is tempting because the phrase "to the store" is a prepositional phrase, but it is not a complex sentence because it lacks a dependent clause.

30-Second Cheat Sheet

To recall the key concepts and rules, remember the following:

• A complete sentence must have a subject and a predicate.
• A fragment is a group of words that lacks a complete thought or a subject and predicate.
• A run-on sentence is a sentence that contains two or more independent clauses without proper conjunction.
• Signal words like however, in addition, and nevertheless can indicate the relationship between clauses.
• Use a sentence diagram to visualize the sentence structure.
• Look for fragments and run-on sentences by checking for groups of words that lack a complete thought or a subject and predicate.

Learning Path

To master this topic, follow this suggested study sequence:

1. Beginner foundation: Review basic sentence structure, including subjects, predicates, and clauses.
2. Core rules: Learn the key concepts and rules, including the definition of a complete sentence, fragment, and run-on sentence.
3. Practice: Practice identifying and correcting sentence errors, analyzing sentence structure, and applying grammatical rules.
4. Timed drills: Practice timed drills to improve your speed and accuracy.
5. Mock tests: Take mock tests to simulate the exam experience and identify areas for improvement.

Related Topics

The following topics are closely related to this one:

• Clause structure: Understanding the different types of clauses, including independent and dependent clauses.
• Sentence types: Identifying and analyzing different types of sentences, including simple, compound, and complex sentences.
• Grammatical errors: Identifying and correcting grammatical errors, including subject-verb agreement, verb tense, and pronoun usage.