Parallel structure, also known as parallelism, is a stylistic device where elements in a sentence that are grammatically similar in construction, function, or meaning are placed side by side. Think of it like building with matching bricks – it creates a sense of order, balance, and rhythm that makes your writing much easier to understand and more persuasive.
When you get parallel structure right, your sentences don't just sound better; they are better. They are clearer, more concise, and more memorable. Readers can follow your train of thought more easily because the consistent pattern signals that related ideas are being presented together.
Why is Parallel Structure Important?
- Clarity: When you use parallel structures, you make it obvious to your reader which ideas are connected. This reduces ambiguity and confusion.
- Emphasis: Parallelism draws attention to the points you're making. The repetition of form highlights the content.
- Rhythm and Flow: Sentences with parallel elements often have a pleasing cadence, making them more engaging to read.
- Memorability: Balanced phrases and clauses are easier for the brain to process and recall.
Common Areas for Parallel Structure
Parallel structure applies to words, phrases, and clauses.
Parallel Words
This is the simplest form. When you list three or more items, they should be in the same grammatical form.
- Incorrect: She likes hiking, biking, and to swim.
- Correct: She likes hiking, biking, and swimming. (All are gerunds – -ing words acting as nouns.)
- Incorrect: He was tired, hungry, and he felt sad.
- Correct: He was tired, hungry, and sad. (All are adjectives.)
Parallel Phrases
Phrases that share a grammatical structure should be kept parallel. This is common with prepositional phrases or infinitive phrases.
- Prepositional Phrases:
Incorrect: The dog ran across the street, through the park, and to the house. Correct: The dog ran across the street, through the park, and into the house. (All are prepositional phrases beginning with a preposition.)
- Infinitive Phrases:
Incorrect: Her goals were to finish college, to find a good job, and she wanted to buy a house. Correct: Her goals were to finish college, to find a good job, and to buy a house. (All are infinitive phrases: "to + verb".)
Parallel Clauses
This is where parallelism can have a significant impact, especially in longer sentences or speeches. Independent clauses or dependent clauses that are meant to be comparable should have the same grammatical structure.
- Independent Clauses:
Incorrect: The team practiced hard, they won the championship, and the fans celebrated. Correct: The team practiced hard, they won the championship, and they celebrated. (Each clause starts with "The team" or "they" followed by a verb.)
- Dependent Clauses:
Incorrect: I don't know if he will come, whether he is prepared, or his intentions. Correct: I don't know if he will come, whether he is prepared, or what his intentions are. (All introduce noun clauses that function as the direct object of "know".)
Parallel Structure in Comparisons (Using "than" or "as")
When you make comparisons, the elements being compared should be parallel.
- Incorrect: He is more interested in studying history than to play video games.
- Correct: He is more interested in studying history than in playing video games. (Both are prepositional phrases.)
Alternatively: He is more interested in studying history than playing video games*. (Both are gerund phrases.)
- Incorrect: The plan was as ambitious as it was expensive.
- Correct: The plan was as ambitious as it was well-funded. (Both are adjective phrases describing the plan.)
Common Pitfalls and How to Avoid Them
- Mixing Verb Tenses: Ensure that if you're listing actions, they use consistent verb tenses.
Incorrect: She sings, danced, and will play the piano. Correct: She sings, dances, and plays the piano. (All present tense.)
- Mixing Noun Forms: Be careful with gerunds (-ing words as nouns) versus infinitives (to + verb).
Incorrect: He enjoyed reading books and to watch movies. Correct: He enjoyed reading books and watching movies.
- Forgetting the "to" in Infinitives: When listing infinitives, make sure each one starts with "to."
Incorrect: We need to buy groceries, clean the house, and prepare dinner. Correct: We need to buy groceries, to clean the house, and to prepare dinner. (This is correct, but often the "to" is understood after the first instance. However, for absolute clarity, especially in formal writing, repeating "to" can be beneficial.)
- Awkward Shifts in Meaning: Sometimes, even if grammatically parallel, the meaning can become strained. Rework the sentence to ensure logical connections.
Incorrect: The report was thorough, well-written, and had many charts. Correct: The report was thorough, well-written, and contained many charts. (The shift from adjectives to a verb phrase feels more natural.)
Putting It into Practice
The best way to master parallel structure is to consciously look for opportunities to use it and to revise your own writing with it in mind.
- Read Aloud: When you read your work aloud, you'll often hear awkwardness or a lack of flow, which can signal a parallelism issue.
- Break Down Sentences: For complex sentences, try to identify the core elements being linked. Are they all the same grammatical type?
- Use a Checklist: When editing, ask yourself: "Are all the items in this list, comparison, or series grammatically alike?"
If you're struggling to achieve consistent parallelism in your academic papers or professional documents, consider the professional editing and AI humanization services at EssayGazebo.com. They can help ensure your writing is not only grammatically sound but also polished and impactful.
Examples in Famous Quotes and Speeches
You've likely encountered powerful examples of parallel structure without even realizing it:
- "I came, I saw, I conquered." (Julius Caesar) - Simple, strong, parallel verbs.
- "Government of the people, by the people, for the people, shall not perish from the earth." (Abraham Lincoln) - Parallel prepositional phrases.
- "Ask not what your country can do for you—ask what you can do for your country." (John F. Kennedy) - Parallel clauses with a contrast.
Notice how these famous lines are not just memorable but also pack a punch due to their balanced construction.
By actively practicing and looking for these patterns, you can significantly improve the clarity, impact, and readability of your writing.