Parallel Structure in English: Rules and Practice Exercises

In the IELTS assessment criteria for Grammatical Range and Accuracy (GRA) and Coherence and Cohesion (CC), the ability to convey information clearly and concisely is a decisive factor for candidates aiming for high band scores. One of the most effective stylistic techniques to ensure your sentences have a balanced, logical, and professional rhythm is Parallelism (or Parallel Structure).

Parallelism is the technique of arranging components with the same grammatical function in a sentence into a uniform format. When you list, compare, or connect ideas, keeping these grammatical components parallel makes your information easier for the reader to process and gives your essay a more polished, sophisticated tone.

This article from ECE English will help you understand the essence of parallelism, how to apply it in practice, and how to avoid common pitfalls that often appear in the IELTS exam.

1. Practical Applications of Parallel Structure

Parallel structure is typically applied in the following three core syntactic contexts:

1.1 Parallel Listing

When using coordinating conjunctions such as and, or, or but to list two or more items or actions, all components in that list must be uniform in terms of part of speech or grammatical structure.

• Noun consistency: The intensive course helps students improve their teamwork, communication, and leadership.

• Gerund consistency (V-ing): Our learning strategy focuses on vocabulary building, essay writing, and time management.

• Infinitive phrase consistency: The university promised to upgrade educational facilities, recruit qualified tutors, and lower tuition fees.

1.2 Correlative Conjunctions

Correlative conjunction pairs such as not only… but also, either… or, neither… nor, both… and, and would rather… than require the elements following the first and second parts to be grammatically similar.

• Adjective phrase example: The proposed solutions are both financially viable and environmentally friendly.

• Verb phrase example: Young graduates want to either find a stable job or start their own business.

1.3 Parallel Comparison

When making comparisons using than or as… as, the two objects or actions being compared must share the same grammatical nature.

• Example: Acquiring new skills is as valuable as building a strong network of professional contacts.

• Example: Many modern professionals prefer flexible remote working to sitting in an office all day.

2. Common Parallelism Pitfalls and How to Fix Them

Students often inadvertently break the parallel structure when writing long, complex sentences, resulting in cluttered and unbalanced prose.

2.1 Mixing Inconsistent Parts of Speech

This is the most common error when listing a series of characteristics but using different word forms at the end of the sequence.

• Incorrect (Not Parallel): The new tutor is intelligent, dedicated, and has a great teaching style. (Adjective, Adjective, and a Clause -> The sentence lacks stylistic consistency).

• Correct (Parallel): The new tutor is intelligent, dedicated, and inspiring. (All are adjectives -> The sentence is balanced).

2.2 Inconsistent Verb Forms in a Sequence

When describing a series of consecutive actions performed by the same subject, the verbs must share the same tense and form.

• Incorrect (Not Parallel): The student entered the library, found a reference book, and is sitting in the quiet corner. (Past, Past, and Present Continuous -> The sentence loses its rhythmic consistency).

• Correct (Parallel): The student entered the library, found a reference book, and sat in the quiet corner. (All verbs are in the simple past).

3. Note: Parallelism in Argument Organization

Beyond individual sentences, parallelism can be applied at the paragraph level when outlining supporting arguments in a logical sequence. When using transition signals such as Firstly, Secondly, Thirdly, and Finally, keeping the structure of your topic sentences similar helps the reader easily grasp your outline.

Example:

Firstly, we will analyze the causes of environmental degradation.

Secondly, we will explore the potential solutions to this issue.

Finally, we will evaluate the role of public awareness in resolving it.

This organizational method creates a tightly structured argument, which is a significant boost for coherence in academic writing.

4. Practice Exercises

Part 1: Fill in the correct form of the word in parentheses to ensure parallelism

1. Lương Thảo Nhi spends her weekends reading academic journals, designing lesson plans, and ________ (mentor) weak students.

2. The ideal candidate for this office management position must be responsible, organized, and ________ (flexibility).

3. The newly implemented system helps administrators monitor teacher performance, track student progress, and ________ (generation) financial reports.

4. To optimize your learning efficiency, you need to set clear goals, manage your time well, and ________ (practice) English every day.

5. High pressure, long working hours, and ________ (stress) environments are the major causes of mental burnout among employees.

6. The executive director promised to review the procurement draft, approve the budget, and ________ (allocate) funds tomorrow.

7. Food importation not only solves immediate hunger issues but also ________ (promote) international relations.

8. The manager prefers managing employees in a structured office to ________ (work) as a freelancer.

9. For a successful educational campaign, we must focus on building partnerships, fostering cooperation, and ________ (cultivate) public trust.

10. The digital test interface was clean, modern, and ________ (interact), which helped candidates navigate the questions easily.

Part 2: Choose the sentence with the most accurate and balanced parallel structure (A or B)

Question 11:

A. The athlete needed intense physical training, daily practice sessions, and plenty of rest before the competition.

B. The athlete needed intense physical training, to practice every day, and a lot of rest before the competition.

Question 12:

A. The store sells elegant clothing for men, modern outfits for women, and children’s clothes are also available.

B. The store sells elegant clothing for men, modern outfits for women, and affordable clothes for children.

Question 13:

A. The new product is available in three distinct colors: black, brown, and retails for twenty dollars.

B. The new product is available in three distinct colors: black, brown, and beige.

Question 14:

A. Mary likes hiking in the forest, swimming in the ocean, and cycling in the morning.

B. Mary likes hiking in the forest, to swim in the ocean, and cycling in the morning.

Question 15:

A. Emma needs to buy a new computer, a modern printer, and she has to get a smartphone.

B. Emma needs to buy a new computer, a modern printer, and a functional smartphone.

Question 16:

A. The movie started out slow, but then it had an action-packed climax and ended on a quiet note.

B. The movie started out slow, but then it has an action-packed climax and it ends on a quiet note.

Question 17:

A. As a business owner, it is important to keep track of finances, manage employees, and market products effectively.

B. As a business owner, it is important to keep track of finances, managing employees, and you should market products.

Question 18:

A. Developing new professional skills allows individuals to take on challenges and advance in their careers.

B. Developing new professional skills allows individuals to take on challenges and the opportunity to advance in their careers.

Question 19:

A. The academic essay was clear, concise, and it convinced the entire examination board.

B. The academic essay was clear, concise, and convincing to the entire examination board.

Question 20:

A. The team was responsible for packing the materials, transporting them safely, and placing them in the storage.

B. The team was responsible for packing the materials, transport them safely, and to place them in the storage.

Part 3: Find and fix the single parallelism error in each sentence

21. The office manager is responsible for handling customer complaints, approving procurement drafts, and he maintains the database.

22. Many students choose to study abroad to experience a new culture, improve their language skills, and for better career opportunities.

23. Traditional working conditions were described as stressful, exhausting, and a threat to employee health.

24. To dream is to envision a better future, and to listen means to understand people deeply.

25. The intensive training course targets improving academic vocabulary, enhancing reading skills, and to boost confidence.

26. The transport of large ornamental plants requires a specialized crane, an experienced logistics team, and planning carefully.

27. The company’s goal is to increase annual revenue, reduce operational costs, and customer satisfaction must be improved.

28. The professor entered the lecture hall, adjusted his glasses, and is looking at the students.

29. The data scientist spent his afternoon analyzing raw data, writing clean Python script, and he deployed the algorithm.

30. The entry requirements for the journalism academy include a high IELTS band score, an excellent academic record, and you must pass the interview.

Part 4: Rewrite the sentences using parallel structure

31. John is a very hardworking employee. He always completes his administrative tasks on time and he never misses a deadline.

-> John is a hardworking employee who ______________________________________

32. The grand concert at the academy was loud. It was also energetic. The music felt upbeat and it was fast-paced.

-> The grand concert at the academy was ___________________________________

33. The company has a clear mission. They want to create quality products. These products must be well-designed, and they need to be affordable.

-> The company’s mission is to create ______________________________________

34. The local government focus on reducing traffic congestion, and protecting the environment is also important, and they want to improve public transit.

-> The local government focus on ___________________________________________

35. Professional managers must know how to budget expenses, and managing employees is also necessary, and they need to organize schedules.

-> Professional managers must know how to ________________________________

36. Limiting the food importation process deprives people of foreign delicacies. It also restricts access to nutrient-rich products.

-> Limiting food importation not only ______________________________________

37. The production process involved gathering raw materials. Then they processed the components. Finally they assembled the final product.

-> The production process involved ___________________________________________

38. The digital test interface allows candidates to flag difficult questions. They can also review their answers, and changing choices is possible.

-> The digital test interface allows candidates to ________________________

39. Good leadership involves listening to employee feedback, and managing the workplace conflicts is also important, and the director must make firm decisions.

-> Good leadership involves _________________________________________________

40. The working conditions at the newly established center are highly professional. They are also flexible and rewarding.

-> The working conditions at the newly established center are _____________

5. Answer Key

Part 1 Answers:

1. mentoring (Consistent gerund form with reading and designing).

2. flexible (Consistent adjective following must be with responsible and organized).

3. generate (Consistent base verb following helps with monitor and track).

4. practice (Consistent base verb following need to with set and manage).

5. stressful (Consistent adjective modifying environments with high and long).

6. allocate (Consistent base verb following promised to with review and approve).

7. promotes (Consistent simple present verb following not only… but also with solves).

8. working (Applying prefer V-ing to V-ing; managing must be parallel with working).

9. cultivating (Consistent gerund form after the preposition on with building and fostering).

10. interactive (Consistent adjective following the verb was with clean and modern).

Part 2 Answers:

11. A (Consistent noun sequence: training, sessions, rest. B is incorrect due to the infinitive to practice).

12. B (Consistent noun phrase sequence. A is incorrect because it ends with a full clause).

13. B (Consistent color noun sequence: black, brown, beige. A is incorrect due to the verb phrase retails for).

14. A (Consistent gerund sequence: hiking, swimming, cycling. B is incorrect due to the infinitive to swim).

15. B (Consistent noun phrase sequence following buy. A is incorrect due to the independent clause she has to get).

16. A (Consistent simple past verb sequence: started, had, ended. B mixes tenses).

17. A (Consistent infinitive sequence following important to: keep, manage, market).

18. A (Consistent infinitive structure after allows individuals to: take on… and advance. B uses a noun phrase that breaks the structure).

19. B (Consistent adjective sequence: clear, concise, convincing).

20. A (Consistent gerund sequence after responsible for: packing, transporting, placing).

Part 3 Answers:

21. Error: he maintains -> Fix: maintaining. (Must be a gerund to match handling and approving).

22. Error: for better career opportunities -> Fix: improve their career opportunities. (Must be an infinitive to match experience and improve).

23. Error: a threat to employee health -> Fix: threatening to employee health. (Must be an adjective/participle to match <i data-path-to-node="63,2,0" data