Many students encounter the question, Which of the following sentences is grammatically nonparallel? on grammar tests, standardized exams, or writing assignments. At first glance, the question may seem confusing, especially if you are not fully familiar with the concept of parallel structure. However, understanding grammatical parallelism is not as complicated as it sounds. In simple terms, parallel structure means keeping the same grammatical form within a sentence when listing items or connecting ideas. When that balance is broken, the sentence becomes grammatically nonparallel. Learning to identify nonparallel sentences improves clarity, strengthens writing skills, and helps you avoid common grammar mistakes.
What Is Parallel Structure?
Parallel structure, also known as parallelism, refers to using the same grammatical pattern when presenting related ideas. This structure often appears in lists, comparisons, and paired conjunctions. Writers use parallelism to create rhythm, balance, and readability.
For example
- She enjoys reading, writing, and painting.
- The manager is responsible for hiring employees, training staff, and supervising operations.
In these examples, each item in the list follows the same grammatical form. That consistency makes the sentences clear and easy to follow.
What Does Grammatically Nonparallel Mean?
A sentence is grammatically nonparallel when it breaks the pattern of structure. This usually happens when items in a list mix different grammatical forms, such as combining verbs with nouns or phrases with clauses.
For instance
- Incorrect She likes swimming, to run, and biking.
- Correct She likes swimming, running, and biking.
In the incorrect version, swimming and biking are gerunds, while to run is an infinitive. The mismatch creates a grammatically nonparallel sentence.
Common Situations Where Nonparallel Structure Appears
1. Lists of Actions
When listing actions, all verbs should follow the same form. Mixing verb tenses or forms often creates nonparallel sentences.
Example of a nonparallel sentence
- He enjoys hiking, to swim, and cycling.
The corrected version would be
- He enjoys hiking, swimming, and cycling.
2. Comparisons
Comparisons require balance. When using words like than or as, both parts of the comparison should match grammatically.
Nonparallel example
- She is more interested in traveling than to stay home.
Corrected version
- She is more interested in traveling than staying home.
3. Paired Conjunctions
Paired conjunctions such as either or, not only but also, and both and require parallel structure on both sides.
Nonparallel example
- He not only likes cooking but also to bake.
Corrected version
- He not only likes cooking but also baking.
How to Identify a Grammatically Nonparallel Sentence
When you see the question, Which of the following sentences is grammatically nonparallel? you should carefully examine the structure of each option. Look for these clues
- Mixed verb forms (e.g., running, to jump, and swims)
- Inconsistent noun and adjective forms
- Unequal phrases or clauses in comparisons
- Broken patterns in lists
One helpful strategy is to isolate each part of the sentence and compare their grammatical forms. If one part does not match the others, the sentence is likely nonparallel.
Why Parallelism Matters in Writing
Parallel structure improves readability and clarity. When sentences are balanced, readers can process information more easily. Nonparallel sentences can sound awkward or confusing.
For example
- Awkward The job requires attention to detail, being organized, and you must communicate well.
- Improved The job requires attention to detail, organization, and strong communication skills.
The improved version flows more smoothly because all elements follow the same grammatical pattern.
Examples of Grammatically Nonparallel Sentences
Here are several examples that demonstrate nonparallel structure
- She enjoys to dance, singing, and acting.
- The company aims to increase profits, expanding its market, and to reduce costs.
- He is interested in learning French, to study Spanish, and Italian.
- They value honesty, being hardworking, and loyalty.
Each sentence mixes different grammatical forms, creating imbalance.
Correcting Nonparallel Sentences
To fix a grammatically nonparallel sentence, identify the repeated pattern and adjust all items to match that structure.
For example
- Original She wants to travel, learning new languages, and meeting people.
- Revised She wants to travel, learn new languages, and meet people.
In the revised version, all verbs are in the base form after to, creating parallel structure.
Parallelism in Academic and Professional Writing
Parallel structure is especially important in academic essays, business writing, and formal communication. Professors and employers often look for clarity and precision in written language.
In research papers, parallel structure strengthens thesis statements and supporting points. In resumes, it makes job descriptions more polished. For example
- Developed marketing strategies
- Managed client relationships
- Increased brand awareness
Using consistent verb forms makes the document look professional and organized.
Parallel Structure in Everyday Communication
Even in casual writing or speech, parallelism enhances clarity. Consider this sentence
- We need to clean the house, finishing homework, and the car needs washing.
This sentence is confusing because it mixes unrelated structures. A parallel version would be
- We need to clean the house, finish our homework, and wash the car.
The revised sentence is clearer and easier to understand.
Tips for Avoiding Nonparallel Sentences
To prevent grammatical errors related to nonparallel structure, follow these practical tips
- Use the same verb tense in lists.
- Match nouns with nouns and verbs with verbs.
- Read sentences aloud to check for awkward phrasing.
- Check both sides of conjunctions for balance.
With practice, recognizing nonparallel sentences becomes easier.
When faced with the question, Which of the following sentences is grammatically nonparallel? the key is to look for imbalance in structure. Parallel structure requires consistency in grammar, especially in lists, comparisons, and paired conjunctions. A grammatically nonparallel sentence disrupts that balance by mixing forms or breaking patterns.
Understanding parallelism not only helps you answer grammar questions correctly but also improves your overall writing skills. Clear and balanced sentences enhance readability, strengthen arguments, and create a more professional tone. By practicing careful analysis and maintaining consistent structure, you can easily identify and correct nonparallel sentences in any context.