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Parallelism (Structural Consistency)

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

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

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. Choose the correct connector to maintain parallel structure: 'Either he will start the project ___ he will delay it.'
easy
A. or
B. nor
C. and
D. but

Solution

  1. Step 1: Identify the correlative pair.

    The sentence uses 'Either ... ___' which requires a parallel correlative partner.

  2. Step 2: Apply the parallelism/correlative rule.

    'Either' pairs with 'or' to present two alternatives.

  3. Step 3: Choose the correct connector.

    The correct pair is 'Either ... or' → 'Either he will start the project or he will delay it.'

  4. Final Answer:

    or → Option A.

  5. Quick Check:

    'Either ... or' (alternatives) ✅
Hint: Pair correlative conjunctions correctly: either/or, neither/nor, not only/but also.
Common Mistakes: Using the wrong partner (e.g., 'either ... and' or 'neither ... or').
2. Choose the sentence with correct parallel structure.
easy
A. She prefers skiing, skating, and hiking.
B. She prefers to ski, skating, and to hike.
C. She prefers skiing, to skate, and hiking.
D. She prefers to ski, skating, and hiking.

Solution

  1. Step 1: Identify the structure used for listed activities.

    Check whether items are gerunds (-ing) or infinitives (to + verb).

  2. Step 2: Apply the parallelism rule.

    All list items must match in grammatical form.

  3. Step 3: Evaluate options.

    Option A uses all gerunds: 'skiing, skating, and hiking' → consistent and correct.

  4. Final Answer:

    She prefers skiing, skating, and hiking. → Option A.

  5. Quick Check:

    All items are -ing forms → parallel ✅
Hint: Pick one form for lists (all -ing or all 'to' + verb).
Common Mistakes: Mixing gerunds and infinitives in the same list.
3. 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.
4. Find the sentence that follows parallel structure in comparison.
medium
A. It is easier to start than to finish a task.
B. It is easier to start than finishing a task.
C. It is easier starting than to finish a task.
D. It is easy to start rather than finishing a task.

Solution

  1. Step 1: Identify the comparison

    'Than' compares two actions - both sides must use the same grammatical form.

  2. Step 2: Match forms across the comparison

    Option A uses infinitives on both sides: to start and to finish, so it is parallel.

  3. Step 3: Verify

    Other choices mix -ing forms and infinitives, which breaks the parallel structure in comparison.

  4. Final Answer:

    It is easier to start than to finish a task. → Option A.

  5. Quick Check:

    On both sides of 'than' use the same verb form (both ‘to + verb’ or both ‘-ing’) - parallel ✅
Hint: Keep the same verb form on both sides of comparisons (than/as).
Common Mistakes: Mixing infinitives and gerunds in comparative structures.
5. Select the sentence that maintains parallel structure in a list of expectations.
medium
A. The manager expects employees to be punctual, to work efficiently, and cooperation.
B. The manager expects employees being punctual, efficient, and cooperative.
C. The manager expects employees to be punctual, efficient, and cooperating.
D. The manager expects employees to be punctual, efficient, and cooperative.

Solution

  1. Step 1: Identify the main verb phrase

    The phrase expects employees to be is followed by qualities - keep those qualities in the same form.

  2. Step 2: Use the same grammatical form for each item

    Option D uses three adjectives (punctual, efficient, cooperative) that match the structure 'to be + adjective'.

  3. Step 3: Verify

    Other options mix nouns, gerunds, or incomplete forms, breaking parallel structure.

  4. Final Answer:

    The manager expects employees to be punctual, efficient, and cooperative. → Option D.

  5. Quick Check:

    After 'to be' list adjectives (not verbs or nouns) - parallel ✅
Hint: After 'to be', list adjectives (punctual, efficient, cooperative) - keep form consistent.
Common Mistakes: Mixing adjectives with verbs/nouns in the same list.

Mock Test

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