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  • Common Mistakes with the Plural of Alumnus
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  • Common Mistakes with the Plural of Basis
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  • Common Mistakes with the Plural of Formula
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Confusing Plurals
Confusing Plurals

Common Mistakes with the Plural of Curriculum

If you are writing an academic paper, a professional email, or even a study note, you have likely paused before…

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Confusing Plurals
Confusing Plurals

Common Mistakes with the Plural of Criterion

The plural of criterion is criteria. This is the most common mistake English learners make with this word: using criteria…

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Confusing Plurals
Confusing Plurals

Common Mistakes with the Plural of Analysis

If you write academic papers, research reports, or even professional emails, you have almost certainly needed the plural of analysis.…

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Confusing Plurals
Confusing Plurals

Common Mistakes with the Plural of Hypothesis

If you have ever written a research paper, a lab report, or even a thoughtful email about a theory, you…

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Confusing Plurals
Confusing Plurals

Common Mistakes with the Plural of Thesis

If you are writing an academic paper, a research summary, or even a formal email, you will likely need to…

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Plural Spelling Rules
Plural Spelling Rules

Alumnus Plural Form: Rule, Examples, and Mistakes

The plural of alumnus is alumni. This follows the Latin second-declension rule for masculine nouns, where the singular ending -us…

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Plural Spelling Rules
Plural Spelling Rules

Stimulus Plural Form: Rule, Examples, and Mistakes

If you are writing about psychology, economics, or biology, you will often need the plural of stimulus. The correct plural…

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Plural Spelling Rules
Plural Spelling Rules

Basis Plural Form: Rule, Examples, and Mistakes

The plural form of basis is bases (pronounced BAY-seez). This follows the standard rule for nouns ending in -is that…

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Plural Spelling Rules
Plural Spelling Rules

Focus Plural Form: Rule, Examples, and Mistakes

The plural of focus can be either focuses or foci. Both forms are correct in modern English, but they are…

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Plural Spelling Rules
Plural Spelling Rules

Medium Plural Form: Rule, Examples, and Mistakes

If you are writing about a spiritualist, a size of clothing, or a method of communication, the plural of medium…

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    We’re the editorial team behind Academic Plural Forms Check, a site that helps you master tricky plurals without the fluff. Whether you’re wrestling with irregular nouns like ‘cactus’ or ‘phenomenon,’ unsure if ‘data’ is singular or plural, or just need a quick refresher on spelling rules like adding -es, we’ve got your back. Each guide focuses on direct answers, real examples, and common mistakes to watch for. Got a question? Drop us a line at [email protected].

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  • Popular
    • Confusing Plurals

      Common Mistakes with the Plural of Alumnus

    • Confusing Plurals

      Common Mistakes with the Plural of Stimulus

    • Confusing Plurals

      Common Mistakes with the Plural of Basis

    • Confusing Plurals

      Common Mistakes with the Plural of Focus

  • Categories
    • Common Plural Forms (15)
    • Confusing Plurals (15)
    • Plural Spelling Rules (15)
    • Singular or Plural Checks (15)
  • About

    Academic Plural Forms Check is a focused English learning resource for academic plural forms. The site is organized around Common Plural Forms, Singular or Plural Checks, Plural Spelling Rules, and Confusing Plurals, so readers can find the right kind of explanation without searching through unrelated topics. Each guide is designed to give a direct answer, practical examples, common mistake notes, and short practice support for real writing, email, study, or everyday conversation.

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    • Common Mistakes with the Plural of Alumnus

      June 13, 2026
    • Common Mistakes with the Plural of Stimulus

      June 12, 2026
    • Common Mistakes with the Plural of Basis

      June 11, 2026
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