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Parallelism (Structural Consistency)

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Introduction

Parallelism (Structural Consistency) means ensuring that words, phrases, or clauses in a sentence follow the same grammatical pattern. Maintaining parallel structure makes sentences clearer, balanced, and more professional. Many grammar questions test whether you can spot mismatched forms like mixing nouns with verbs or changing tense or pattern within a list.

Pattern: Parallelism (Structural Consistency)

Pattern: Parallelism (Structural Consistency)

Key idea: Items in a list or comparison must follow the same grammatical form.

- Use the same form for verbs: “to run, to swim, and to cycle” OR “running, swimming, and cycling.”
- Use the same structure in comparisons: “She likes dancing more than singing.”
- Maintain consistency after conjunctions like and, or, but.
- Maintain parallel structure after correlative pairs: either… or, neither… nor, not only… but also.

Step-by-Step Example

Question

Identify the sentence with correct parallel structure:

A. She likes reading, to write, and dancing.
B. She likes to read, writing, and to dance.
C. She likes reading, writing, and dancing.
D. She likes to read, to writing, and to dance.

Solution

  1. Step 1: Identify the list components.

    The sentence lists multiple activities after the verb “likes.”

  2. Step 2: Apply the parallelism rule.

    All items must use the same grammatical form (all -ing forms or all infinitives).

  3. Step 3: Check each option.

    Only Option C uses a consistent pattern: reading, writing, and dancing.

  4. Final Answer:

    She likes reading, writing, and dancing. → Option C.

  5. Quick Check:

    All items in the list follow the same “-ing” form → correct parallelism ✅

Quick Variations

1. Verb Forms Parallelism: “He came, saw, and conquered.”

2. Noun Parallelism: “Her goals include success, growth, and happiness.”

3. Correlative Conjunctions: “She is not only talented but also hardworking.”

4. Comparisons: “Swimming is easier than running.”

5. Infinitive Forms: “She wants to learn to code and to design.”

Trick to Always Use

  • Step 1: Identify the list, comparison, or pair in the sentence.
  • Step 2: Check the grammatical form of each item.
  • Step 3: Ensure all items follow the same structure (all nouns, all verbs, all -ing forms, all infinitives).
  • Step 4: For correlative pairs, ensure what follows each half is parallel.

Summary

  • Parallelism means matching grammatical forms in lists and comparisons.
  • Use consistent forms: all infinitives OR all -ing forms OR all nouns.
  • Correlative conjunctions require strict parallel structure.
  • Quick check: If it lists items or compares ideas → check parallel structure.

Practice

(1/5)
1. Identify the part with incorrect parallel structure: 'He likes to jog, swim, and going to the gym.'
easy
A. to jog
B. swim
C. going to the gym
D. No error

Solution

  1. Step 1: Identify the list elements.

    The sentence lists three activities after 'likes'.

  2. Step 2: Apply the parallelism rule.

    All items should use the same grammatical form (all infinitives or all gerunds).

  3. Step 3: Spot the mismatch.

    'to jog' (infinitive) and 'swim' (bare verb/infinitive sense) are not the same form as 'going to the gym' (gerund phrase) → inconsistent.

  4. Final Answer:

    going to the gym → Option C.

  5. Quick Check:

    Make all items the same: 'to jog, to swim, and to go to the gym' or 'jogging, swimming, and going to the gym' ✅
Hint: Make list items the same form (all -ing or all 'to' + verb).
Common Mistakes: Mixing infinitives and gerunds in the same list.
2. Choose the sentence that shows correct parallelism.
easy
A. She enjoys reading, writing, and painting.
B. She enjoys to read, writing, and to paint.
C. She enjoys reading, to write, and painting.
D. She enjoys to read, write, and painting.

Solution

  1. Step 1: Spot the list

    The sentence lists three activities that must use the same grammatical form.

  2. Step 2: Choose one form and use it consistently

    Option A uses all gerunds (-ing): reading, writing, painting - this is parallel.

  3. Step 3: Verify

    Other options mix infinitives and gerunds, breaking parallel structure.

  4. Final Answer:

    She enjoys reading, writing, and painting. → Option A.

  5. Quick Check:

    All list items share the same form (all -ing) - parallel ✅
Hint: Use all -ing or all ‘to + verb’ forms in a list - don’t mix.
Common Mistakes: Mixing infinitives and gerunds in the same list.
3. Which sentence is grammatically parallel?
easy
A. The teacher said we should listen carefully, think critically, and to speak clearly.
B. The teacher said we should listening carefully, think critically, and speak clearly.
C. The teacher said we should listen carefully, think critically, and speak clearly.
D. The teacher said listen carefully, thinking critically, and speak clearly.

Solution

  1. Step 1: Spot the auxiliary verb

    The sentence uses should, so verbs that follow must be in base form.

  2. Step 2: Ensure each verb matches the required form

    Option C uses base verbs after ‘should’: listen, think, speak - all parallel.

  3. Step 3: Verify

    Other options use mixed forms (infinitives, gerunds) and break parallelism.

  4. Final Answer:

    The teacher said we should listen carefully, think critically, and speak clearly. → Option C.

  5. Quick Check:

    After modal verbs like should/can/must, keep verbs in base form - parallel ✅
Hint: After modals (should, can, must) keep verbs in base form for parallel lists.
Common Mistakes: Using gerunds or infinitives after modal verbs.
4. Identify the part with incorrect parallelism: 'He likes reading, to write, and drawing.'
medium
A. reading
B. to write
C. drawing
D. No error

Solution

  1. Step 1: List the items after the verb 'likes'.

    We have 'reading', 'to write', and 'drawing'.

  2. Step 2: Check for consistent form.

    'reading' and 'drawing' are gerunds (-ing), but 'to write' is an infinitive → mismatch.

  3. Step 3: Identify incorrect part.

    'to write' breaks the parallel pattern and should be 'writing' to match the others.

  4. Final Answer:

    to write → Option B.

  5. Quick Check:

    Make all -ing: 'reading, writing, and drawing' ✅
Hint: If two items are -ing, convert the third to -ing too.
Common Mistakes: Assuming mixed forms are acceptable in lists.
5. Identify the part with incorrect parallel structure: 'The job requires planning, organizing, leading, and to control resources.'
medium
A. planning
B. organizing
C. leading
D. to control resources

Solution

  1. Step 1: Identify the series of requirements.

    The list contains 'planning, organizing, leading, and to control resources'.

  2. Step 2: Apply parallelism rule.

    'planning', 'organizing', and 'leading' are gerund (-ing) forms; the last item is an infinitive phrase 'to control resources' → inconsistent.

  3. Step 3: Choose the incorrect part.

    'to control resources' should be 'controlling resources' to match the others.

  4. Final Answer:

    to control resources → Option D.

  5. Quick Check:

    Convert to gerund: 'planning, organizing, leading, and controlling resources' ✅
Hint: Match the form used by the first items in the list for the rest.
Common Mistakes: Leaving one item in a different verb form and missing the mismatch on a long phrase.