Each Other vs One Another: The Definitive ESL Guide

Introduction

Do you ever stop mid-sentence, wondering whether to write “they helped each other” or “they helped one another“? You are not alone! This is one of the most common questions ESL learners ask, and the good news is that the answer is simpler than you might think. In this guide, we will look at the traditional rule, the modern reality, and plenty of examples so you can use both phrases with confidence.

What Are “Each Other” and “One Another”?

Each other and one another are reciprocal pronouns. A reciprocal pronoun shows that an action goes in two directions — person A does something to person B, and person B does something to person A. Instead of saying “Anna helped Ben and Ben helped Anna,” we simply say “Anna and Ben helped each other.” Both phrases work the same way grammatically, but there is a traditional difference in how many people they refer to.

Rules

1. Traditional rule: Use each other for two people or things, and one another for three or more. Example: “The two sisters called each other every day.” / “The teammates encouraged one another.”
2. Modern usage: Most native speakers now use the two phrases interchangeably, especially in everyday conversation. Both are grammatically correct in modern English.
3. Formal writing: In academic or formal texts, the traditional distinction is still appreciated, so follow the two-versus-three-or-more rule when you want to be precise.
4. Possessive form: Add an apostrophe to show possession: each other’s and one another’s. Example: “They borrowed each other’s books.”
5. Never use a subject pronoun after them: Say “They looked at each other,” not “They looked at each other them.” The reciprocal pronoun already carries the meaning.
6. They cannot be subjects: Each other and one another are objects only. Say “They respect each other,” not “Each other respect them.”

How to Use It

Follow these steps whenever you want to express a two-way action:

1. Check the direction of the action. If A acts on B and B acts on A, you need a reciprocal pronoun. “Tom and Lucy emailed each other.”
2. Count the people or things. Two? Use each other (traditional). Three or more? Use one another (traditional). In casual English, either is fine.
3. Place it after the verb or preposition. “They smiled at one another.” / “We trust each other.”
4. Add ‘s for possession. “The students read each other’s essays.”
5. Keep the verb plural. The subject is plural, so the verb agrees with it: “They help each other,” not “They helps each other.”

Examples in Sentences

• The two brothers always support each other during difficult times.
• My grandparents have loved each other for fifty years.
• The five committee members disagreed with one another about the budget.
• After the argument, the friends apologised to each other.
• The players passed the ball to one another throughout the match.
• Good neighbours look after each other’s houses when someone is away.
• The students exchanged one another’s phone numbers before the summer break.
• We should listen to each other more carefully.
• The children in the class encouraged one another before the exam.
• My two cats seem to understand each other perfectly.
• The members of the team congratulated one another after the victory.
• Couples who respect each other usually communicate better.

Common Mistakes

Mistake 1: Using a pronoun after the reciprocal pronoun.
❌ They helped each other them.
✅ They helped each other.

Mistake 2: Using it as a subject.
❌ Each other are very kind.
✅ They are kind to each other.

Mistake 3: Forgetting the apostrophe for possession.
❌ They borrowed each others books.
✅ They borrowed each other’s books.

Mistake 4: Using a singular verb.
❌ The girls helps one another.
✅ The girls help one another.

Mistake 5: Using them for actions that only go one way.
❌ Maria thanked each other.
✅ Maria thanked everyone. (The action only goes one direction, so a reciprocal pronoun does not fit.)

Quick Summary

• Each other and one another are reciprocal pronouns showing two-way actions.
• Traditional rule: each other = two; one another = three or more.
• Modern English accepts both interchangeably in most situations.
• Possessive forms: each other’s / one another’s.
• Never add a pronoun after them and never use them as subjects.
• Use them only when the action truly goes in both directions.

Practice Exercises

Fill in the blank with each other or one another (or their possessive forms). Remember: both are often accepted, but try the traditional rule first!

1. The two best friends told ______ all their secrets.
2. The eight volunteers helped ______ during the clean-up day.
3. My parents often finish ______ sentences.
4. The three cousins borrowed ______ clothes without asking.
5. After the meeting, the two managers shook hands with ______.

Answers:

1. each other (two people)
2. one another (eight people)
3. each other’s (two people, possessive)
4. one another’s (three people, possessive)
5. each other (two people)

Conclusion

Mastering each other and one another is easier than it looks: follow the traditional two-versus-many rule in formal writing, relax in casual conversation, and always check that the action really goes both ways. With a little practice, these reciprocal pronouns will become a natural part of your English.

FAQ

1. Can I use “each other” for more than two people?
Yes. In modern English, each other is widely used for any number of people or things. The traditional rule prefers one another for three or more, but both are accepted in everyday speech and most writing.

2. Is “one another” more formal than “each other”?
Not exactly. Both are neutral in register. However, because one another follows the traditional rule for larger groups, it often appears in formal and academic texts when referring to three or more people.

3. What is the possessive form of these pronouns?
Simply add an apostrophe and an s: each other’s and one another’s. For example: “The colleagues reviewed each other’s reports.”

4. Can “each other” and “one another” be used as the subject of a sentence?
No. They are object pronouns. You can say “They respect each other,” but not “Each other respect them.” The plural subject (they, we, the students) does the action, and the reciprocal pronoun receives it.