Parallel structure, also known as parallelism, is a fundamental principle in grammar and writing that enhances clarity, rhythm, and impact. It involves using the same pattern of words, phrases, or clauses to express related ideas. This grammatical technique is not merely about aesthetic appeal; it is a powerful tool for effective communication, making your writing more organized, memorable, and persuasive.
When elements in a sentence are parallel, they are balanced and easy for the reader to process. This consistency creates a sense of order and logic, guiding the reader smoothly through your thoughts. Mastering parallel structure can transform ordinary sentences into elegant and powerful statements, elevating the overall quality of your written work.
The Core Concept of Parallelism
At its heart, parallel structure is about grammatical consistency. It means that if you start a list or comparison with a certain grammatical form, you should continue with that same form for all subsequent items. This applies to words, phrases, and even entire clauses.
For example, when listing actions, each item should ideally be in the same verb tense and form. If you say “She likes to run, to swim, and to bike,” all the infinitive phrases are parallel. This creates a pleasing rhythm and emphasizes the equal importance of each activity.
The absence of parallelism can lead to confusion or awkwardness. Consider the sentence: “He enjoys hiking, to read novels, and watching documentaries.” The shift from a gerund (“hiking”) to an infinitive phrase (“to read novels”) and then to a present participle (“watching documentaries”) breaks the flow and makes the sentence feel disjointed.
Identifying Parallel Elements
Identifying parallel elements is the first step toward mastering this technique. Look for conjunctions like “and,” “but,” and “or,” as these often connect parallel items. Also, pay attention to items in lists, comparisons, and clauses that are meant to be treated equally.
In a sentence like “The company aims to increase profits, expand market share, and improve customer satisfaction,” the three infinitive phrases (“to increase profits,” “expand market share,” and “improve customer satisfaction”) are parallel. They all represent goals and are structured identically.
Recognizing these connecting words and the structures they link is crucial. This awareness allows you to spot instances where parallelism is present and where it is missing.
The Importance of Grammatical Form
The key to parallel structure lies in maintaining the same grammatical form. This means if you use a noun, use nouns for all comparable items. If you use a verb phrase, stick to verb phrases.
For instance, in the sentence “She is intelligent, creative, and ambitious,” all three adjectives are parallel. This creates a balanced description of her qualities.
When different grammatical forms are mixed, the sentence loses its balance and can sound jarring. Ensuring consistent form is paramount for effective parallelism.
Applications of Parallel Structure
Parallel structure is not confined to simple lists. It can be applied in various contexts to enhance writing. These applications range from simple sentence construction to more complex rhetorical devices.
Parallelism in Lists and Series
Lists are perhaps the most common place to encounter and implement parallel structure. When presenting a series of items, ensuring they share the same grammatical form makes the list clear and easy to follow.
A sentence like “We bought apples, bananas, and oranges” is perfectly parallel, with each item being a plural noun. This maintains a consistent rhythm and grammatical integrity.
Conversely, “We bought apples, bananas, and some orange juice” breaks the parallelism because “some orange juice” is a noun phrase, not a plural noun. To correct this, one might say “We bought apples, bananas, and oranges” or “We bought apples, bananas, and orange juice.”
Parallelism in Comparisons
Comparisons often involve parallel structures to highlight the similarities or differences between two or more things. Using parallel forms ensures that the comparison is clear and fair.
Consider the sentence: “She prefers reading books to watching movies.” Both “reading books” and “watching movies” are gerund phrases, making the comparison parallel and easy to understand.
If the sentence were “She prefers reading books to watch movies,” the shift from a gerund phrase to an infinitive phrase would disrupt the parallelism, making the comparison less effective.
Parallelism in Clauses
Parallel structure can extend to entire clauses, especially in compound sentences or when introducing related ideas. This creates a powerful sense of balance and emphasis.
A classic example is John F. Kennedy’s inaugural address: “Ask not what your country can do for you—ask what you can do for your country.” The two independent clauses are structured in a parallel, inverted way, creating a memorable and impactful message.
Another instance might be: “He promised he would arrive on time, and he vowed that he would bring the necessary documents.” The two subordinate clauses introduced by “that” are parallel, reinforcing the strength of his promises.
Benefits of Using Parallel Structure
The deliberate use of parallel structure offers numerous advantages for writers. It goes beyond mere correctness to significantly improve the quality and effectiveness of communication.
Enhancing Clarity and Readability
Parallelism makes sentences easier to understand and process. When grammatical structures are consistent, the reader’s brain doesn’t have to work as hard to identify the relationships between ideas.
This consistency acts like signposts, guiding the reader through the sentence’s logic. It reduces cognitive load, allowing the reader to focus on the meaning rather than the mechanics.
A sentence with clear parallelism is inherently more readable. The predictable pattern creates a smooth flow, preventing the reader from stumbling over awkward phrasing.
Improving Rhythm and Flow
Well-executed parallel structure creates a pleasing rhythm, much like a well-composed piece of music. This rhythmic quality can make writing more engaging and enjoyable to read.
The repetition of grammatical patterns generates a natural cadence. This can be particularly effective in speeches, persuasive writing, or any text where impact is desired.
The balanced construction contributes to a smooth, flowing narrative. It helps to avoid abrupt shifts in sentence structure that can disrupt the reader’s immersion.
Adding Emphasis and Impact
Parallelism is a powerful tool for emphasis. By presenting related ideas in an identical structure, you signal their equal importance and draw attention to them.
This technique can make key points stand out, reinforcing the message you wish to convey. It lends a sense of authority and conviction to your statements.
Famous speeches and literary works often employ parallelism to create memorable and impactful phrases. The balanced structure makes these statements resonate with the audience.
Strengthening Persuasiveness
The logical order and clarity provided by parallelism can significantly enhance persuasiveness. A well-structured argument is often perceived as more credible and convincing.
When ideas are presented in a balanced and consistent manner, they appear more reasoned and thought-out. This logical appeal can sway readers more effectively.
The rhythmic quality also contributes to memorability, making persuasive points more likely to stick with the reader long after they have finished reading.
Common Pitfalls and How to Avoid Them
While parallel structure is beneficial, it’s easy to fall into common traps. Awareness of these pitfalls is key to using parallelism effectively.
Mixing Grammatical Forms
The most frequent error is failing to maintain consistent grammatical forms. This happens when different parts of speech or different types of phrases are used to express parallel ideas.
For example, “She likes swimming, to hike, and to read.” The mix of a gerund (“swimming”) with two infinitive phrases (“to hike,” “to read”) is unbalanced. Correcting this would involve making all items gerunds: “She likes swimming, hiking, and reading.”
Carefully check each item in a series or comparison to ensure it matches the grammatical form of the others.
Inconsistent Verb Tenses
When listing actions or events, inconsistent verb tenses can disrupt parallelism. All verbs in a parallel series should generally be in the same tense.
Consider: “He opened the door, walked inside, and sat down.” All verbs are in the past tense, maintaining parallelism. However, “He opened the door, walks inside, and sat down” is incorrect due to the shift to the present tense.
Always review your verb tenses to ensure they align within a parallel structure.
Confusing Comparative Structures
Comparisons using “than” or “as” require careful attention to parallelism. The elements being compared should be grammatically equivalent.
A correct example is: “Studying for the test was more difficult than taking the quiz.” Both “Studying for the test” and “taking the quiz” are gerund phrases. An incorrect version might be: “Studying for the test was more difficult than the quiz.”
Ensure that what follows “than” or “as” is a structure parallel to what precedes it.
Overuse and Awkwardness
While beneficial, forcing parallelism where it doesn’t naturally fit can lead to awkward or unnatural sentences. Not every sentence requires a strict parallel structure.
Sometimes, a slight variation in structure is more effective or simply more natural. Overly rigid adherence can make writing sound stilted.
Use your judgment to determine when parallelism enhances your writing and when it might detract from it. Prioritize clarity and natural flow.
Advanced Techniques and Applications
Beyond basic lists and comparisons, parallelism can be employed in more sophisticated ways to enhance rhetorical effect and stylistic flair.
Antimetabole and Chiasmus
Antimetabole is a rhetorical device that repeats words in successive clauses, but in reverse grammatical order. This creates a striking, memorable effect.
A classic example is “Ask not what your country can do for you—ask what you can do for your country.” The reversal of “country can do for you” and “you can do for your country” is antimetabole.
Chiasmus is a broader concept where grammatical structures or concepts are reversed. It often involves a crisscross pattern (A-B-B-A).
Anaphora and Epistrophe
Anaphora involves the repetition of a word or phrase at the beginning of successive clauses or sentences. This builds emphasis and a sense of momentum.
Martin Luther King Jr.’s “I Have a Dream” speech famously uses anaphora: “I have a dream that one day this nation will rise up… I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their character.” The repeated “I have a dream” is a powerful example.
Epistrophe, conversely, repeats a word or phrase at the end of successive clauses or sentences. This creates a strong concluding emphasis.
Parallelism in Poetry and Song Lyrics
Poets and songwriters frequently use parallel structure to create rhythm, enhance imagery, and convey emotional impact. The musicality of language is often amplified through consistent patterns.
Rhyme schemes and meter already provide a form of structure, and parallelism complements this by adding another layer of predictability and emphasis within lines or stanzas.
The repetition inherent in parallel structures can also contribute to the memorability of lyrics, making them more accessible and impactful for listeners.
Practical Exercises for Improvement
Developing a strong sense of parallel structure requires practice. Engaging in targeted exercises can significantly hone this skill.
Rewriting Sentences
Take sentences that lack parallelism and rewrite them to correct the issue. This is a direct way to practice identifying and fixing structural imbalances.
Start with simple sentences containing lists or comparisons and gradually move to more complex structures. Focus on ensuring consistent grammatical forms.
For example, rewrite “He is a good husband and father, and he is a successful businessman” to “He is a good husband, a good father, and a successful businessman” or “He is a good husband and father, and a successful businessman.”
Analyzing Texts
Read published works and actively look for examples of parallel structure. Analyze how writers use it to achieve clarity, rhythm, and emphasis.
Pay attention to speeches, essays, and even well-written fiction. Identifying successful examples provides models for your own writing.
Consider why a particular author chose to use parallelism in a specific instance and what effect it has on the reader.
Self-Editing for Parallelism
Make it a habit to check for parallelism during your editing process. This means actively scanning your work for potential errors.
Read your sentences aloud. The rhythm and flow (or lack thereof) can often highlight where parallelism is missing or broken.
Look specifically for conjunctions like “and,” “but,” “or,” and for items in series, comparisons, and correlative conjunctions (e.g., “either…or,” “neither…nor,” “not only…but also”).
Parallelism in Different Writing Contexts
The application and importance of parallel structure can vary depending on the type of writing you are engaged in.
Academic Writing
In academic writing, clarity and precision are paramount. Parallelism ensures that complex ideas and research findings are presented logically and without ambiguity.
Consistent structure in literature reviews, methodology sections, and discussion of results helps readers follow intricate arguments. It reinforces the author’s organized approach to the subject matter.
Academic journals and style guides often implicitly or explicitly encourage parallel construction for its contribution to scholarly rigor.
Business and Professional Writing
Business communication demands conciseness and impact. Parallelism helps to make reports, proposals, and presentations more digestible and persuasive.
Well-structured bullet points or lists in a business plan can quickly convey key objectives or financial data. This efficiency is highly valued in professional settings.
The clarity provided by parallel structure can also prevent misunderstandings in contracts, policy documents, and internal memos.
Creative Writing
In fiction and poetry, parallelism can be used for stylistic effect, to create rhythm, and to emphasize character or thematic elements.
Authors might use parallel sentence structures to mirror a character’s thoughts or actions, creating a sense of internal consistency or contrast.
The musicality and memorability that parallelism lends can be a powerful tool for engaging the reader’s imagination and emotions.
Correlative Conjunctions and Parallelism
Correlative conjunctions are pairs of conjunctions that work together to connect elements in a sentence. Maintaining parallel structure with these is essential.
Common correlative conjunctions include “either…or,” “neither…nor,” “both…and,” “not only…but also,” and “whether…or.” The rule is that whatever follows the first part of the conjunction should be grammatically parallel to whatever follows the second part.
For example, “She is not only intelligent but also creative.” Here, “intelligent” (adjective) and “creative” (adjective) are parallel. An incorrect version would be: “She is not only intelligent but also a creative person.”
Careful placement of the correlative conjunctions ensures that the elements they introduce maintain grammatical balance.
The Nuances of Parallelism in Complex Sentences
Applying parallelism in complex sentences, which contain multiple clauses, requires more attention to detail. The goal is to maintain coherence across different levels of sentence structure.
When multiple dependent clauses are introduced by the same subordinating conjunction (e.g., “that” or “when”), they should ideally share a parallel form. This reinforces the relationship between these clauses and the main clause.
Similarly, in sentences with compound subjects or predicates, ensuring parallelism within those components is key to overall sentence clarity.
Conclusion on Mastery
Mastering parallel structure is an ongoing process that enhances both the technical accuracy and the artistic quality of your writing. It transforms simple statements into eloquent expressions and complex arguments into easily digestible information.
By understanding its principles, recognizing common errors, and practicing consistently, you can unlock the full potential of this powerful grammatical tool. The result is writing that is clearer, more rhythmic, more impactful, and ultimately, more effective in communicating your ideas.