Identifying & Correcting Common Sentence Errors and Sentence Types by Structure

Error 1: Sentence Fragments

A group of words punctuated as a sentence that cannot stand alone as a complete

thought. A complete grammatical sentence must contain at least one independent clause—requiring both a subject and a predicate verb to express a finished idea.

EXAMPLES:

1. Hanging dependents - starting with subordinating conjunctions like “because”

2. Missing elements - no subject or verb

3. Unassisted participles - Using -ing or -ed words without a helping verb (auxilliary).

Error 2: Comma Splices

Joining two independent clauses together with only a comma. A comma is designed to separate list items or set off introductory phrases. It lacks the grammatical strength to bind two independent thoughts on its own.

SOLUTION:

1. Use a semicolon

2. Use a period

3. Use a coordinating conjuction (fanboys)

Error 3: Run-on (Fused) Sentences

Running independent clauses together with no punctuation or coordinating conjunctions. A run-on occurs when a writer rushes to connect ideas without signaling transitions to the reader.

SOLUTION:

1. Use a semicolon

2. Use a period

3. Use a coordinating conjuction (fanboys)

Error 4: Dangling Modifiers

Occurs when the target word or phrase being described is missing from the sentence entirely. In English syntax, an introductory modifying phrase naturally targets the very first noun or pronoun that follows the comma. If that noun is missing, the modifier "dangles," creating an illogical statement.

Error 5: Misplaced Modifiers

A descriptor placed too far from the word it modifies, creating confusion or unwanted humor.

SAMPLE SENTENCE:

We bought a secondhand laptop from a classmate with a cracked screen.

The Issue: "With a cracked screen" sits next to "classmate," humorously implying the student has a cracked face.

Error 6: Unnecessary Shifts

Abruptly changing tense, grammatical number, or person within a sentence or

paragraph.

Tense Shifts

Swapping past & present without time reason.

Number Shifts

Mixing singular & plural references.

Person Shifts

Jumping viewpoints (one / you / I).

Error 7: Faulty Parallelism

Failing to use matching grammatical structures for items in a list, series, or

comparison.

SAMPLE:

The research assistant enjoys reading journals, analyzing data, and to write reports.

Issue: Inconsistent, to write should be “writing” to follow the first two -ing

Sentence Types by Structure

A complete guide to simple, compound, complex, and compound-complex sentence

architecture.

The Core Building Blocks - Independent vs Dependent clauses

• Independent Clause- Contains a subject and a verb, expressing a complete thought. It can stand alone as a sentence.

• Dependent Clause - Contains a subject and verb but starts with a dependent clause marker (because, since). It cannot stand alone.

• Clause - A group of words containing a subject and a verb

The Simple Sentence

• Formula: 1 Independent Clause

• A simple sentence expresses a single complete thought. It contains no dependent

  clauses, though subject or predicate may be compound.

• Sample: "Maya reads books daily."

Compound Sentence

• Formula: Ind. Clause + Ind. Clause

• Joins two or more independent clauses of equal weight using a comma with a

  coordinating conjunction (FANBOYS) or a semicolon.

• Sample: "I wanted to go for a run, but it started pouring rain."

The Complex Sentence

• 1 Ind. Clause + 1+ Dep. Clause

• Connects an independent clause with at least one dependent clause introduced by subordinators like because, although, even if, so that.

• Sample: "Sarah passed because she prepared."

Compound-Complex Sentence

• Formula: 2+ Ind. Clauses + 1+ Dep. Clause (3 clause or more)

• Combines compound and complex structures to express multi-layered thoughts

  and detailed narrative chains.

• Sample: "Although it was late [Dep], Leo continued working [Ind], and he finished

  before morning [Ind]."

Coordinating Conjustions

• Join equal independent clauses. (FANBOYS)

Subordinating Conjuctions

• Single & Multi-word Phrases: Start dependent clauses.

• because, although, since, as soon as, even though, so that, in order that

Relative Pronouns

• Subordinate Introduce Clauses: Point to nouns or pronouns. a word used to connect a noun to a clause that gives more information about that noun

• who, whom, whose, which, that, whoever, whichever

Writing with Variety

• Pacing & Rhythm: Short simple sentences create emphasis and urgency; longer complex sentences build smooth narrative flow.

• Avoiding Monotony: Overusing simple sentences sounds choppy, while overusing complex sentences exhausts the reader.

• Stylistic Mastery: Varying sentence structure reflects sophisticated writing and enhances overall argument clarity.