Choosing between their life or their lives can feel confusing because the pronoun their can refer to one person or several people. The real question is not about the word their. It is about whether the noun life refers to one shared life or several separate lives. Once you understand that point, the choice becomes much easier. 😊
For example, you might write, “The twins changed their lives after college.” That means each twin has a separate life. But you might say, “The couple built their life together.” Here, life describes one shared experience.
I have taught this difference to students and writers for years. The good news is that the rule is simple. In this guide, I’ll explain the difference, show clear examples, cover common mistakes, and give you easy tests you can use whenever you are unsure. Lath vs Lathe | Jewelry or Jewellery | Spoilt vs Spoiled
🎯 Quick Answer: Their Life or Their Lives
Their life or their lives depends on whether you mean one shared life or multiple individual lives. Use their life when life describes one person or one shared existence. Use their lives when life refers to two or more people’s separate lives.
Compare these examples:
- “The couple enjoys their life in the countryside.” This describes one shared life.
- “The sisters enjoy their lives in different cities.” This describes separate lives.
The key is the meaning, not simply the number of people mentioned.
Their Life or Their Lives: The Basic Difference
The basic difference between their life and their lives is singular versus plural meaning. Life is singular, while lives is plural.
| Form | Type | Meaning | Example | Correct/Incorrect |
|---|---|---|---|---|
| their life | Singular noun phrase | One life or shared existence | The couple loves their life together. | ✅ Correct |
| their lives | Plural noun phrase | More than one separate life | The brothers live their lives differently. | ✅ Correct |
| their lifes | Incorrect plural | Not the standard plural form | They changed their lifes. | ❌ Incorrect |
| there life | Wrong word | Uses there instead of their | They changed there life. | ❌ Incorrect |
| their lifes’ | Incorrect form | Incorrect plural spelling | Their lifes’ changed. | ❌ Incorrect |
The spelling change from life to lives is irregular. You do not simply add -s. The final f changes to v, giving us lives.
Is Their Life Correct? 💡
Yes, their life is correct when the noun life refers to one person or one shared life. The word their can be used with a singular person as a gender-neutral pronoun, so one person can have “their life.”
For example:
Jordan wants to improve their life.
Here, Jordan is one person. Therefore, life is singular.
It can also describe a shared existence:
The newlyweds are happy with their life together.
The couple has two individual lives, but the sentence focuses on their shared life as a couple.
Singular person
When their refers to one person, use life if you are talking about that person’s existence.
- “Every student should enjoy their life.” ✅
- “Every child deserves a safe life.” ✅
- “Alex is proud of their life.” ✅
The noun remains singular because the meaning is about one person’s life.
One shared experience
A group can also have their life when the sentence describes one shared existence.
- “The family enjoys their life on the farm.” ✅
- “The couple built their life together.” ✅
- “The team changed their life after moving.” ⚠️
The last example may sound less natural if team means several individuals. In that case, their lives may be better if you mean each person’s experience.
Test Tip 💡
Ask yourself:
“Am I talking about one life or one shared life?”
If the answer is yes, choose their life.
When Should You Use Their Lives? 🌱
Use their lives when you mean two or more separate lives. The plural noun shows that different people have different lives.
For example:
The brothers went on to build successful careers and lives.
Each brother has his own life, so lives is appropriate.
Other examples include:
- “The students returned to their lives after graduation.” ✅
- “The sisters live very different lives.” ✅
- “The workers balanced their jobs with their lives.” ✅
- “The children went back to their lives after the trip.” ✅
The plural form is especially common when people have separate homes, jobs, relationships, goals, or experiences.
Separate people, separate lives
Consider this sentence:
Maria and Emma live different lives.
There are two people and two separate experiences. Therefore, lives is correct.
Now compare:
Maria and Emma built their life together.
This can be correct if Maria and Emma are a couple or otherwise intentionally sharing one life.
The meaning changes the noun.
Different experiences
Use lives when the sentence emphasizes differences.
The two athletes lead completely different lives.
Each athlete has an individual lifestyle.
A useful table
| Meaning | Word Type | Example Sentence |
|---|---|---|
| One person’s existence | Singular | She enjoys their life. |
| One shared existence | Singular | The couple loves their life together. |
| Several separate existences | Plural | The siblings live different lives. |
| Several individual experiences | Plural | The travelers returned to their lives. |
Why Do People Confuse Their Life and Their Lives? 🤔
People often confuse these forms because their does not tell you whether the noun should be singular or plural. The noun depends on the meaning of the sentence.
I once reviewed a student’s essay about three friends. The student wrote, “They all wanted to improve their life.” The sentence was understandable, but the surrounding paragraph described three separate goals, homes, and careers. I suggested their lives because the writer was clearly talking about individual experiences.
This is the key lesson: look at what the sentence means, not just the pronoun before the noun.
Another reason is that English allows their with both singular and plural references.
Compare:
- One person → their life
- Several people → their lives
But a group can sometimes take either form depending on whether you mean a shared life or separate lives.
Their Life vs Their Lives at a Glance 📊
The easiest way to understand the difference is to compare the meaning directly.
| Sentence | Correct/Incorrect | Why |
|---|---|---|
| The couple loves their life together. | ✅ Correct | One shared life is meant. |
| The sisters live different lives. | ✅ Correct | Each sister has a separate life. |
| Every person should enjoy their life. | ✅ Correct | One person is meant at a time. |
| The friends went back to their lives. | ✅ Correct | Each friend returned to an individual life. |
| The brothers changed their life. | ⚠️ Depends | Correct only if one shared life is meant. |
Notice the fifth sentence. Grammar is not always about counting people. Meaning matters.
How Can You Tell Which Form Is Correct? 🎯
You can choose the correct form by asking one simple question:
Does each person have a separate life in this sentence?
If yes, use lives.
If no, and you mean one person’s life or one shared existence, use life.
Try this three-step test:
- Find the people referred to by their.
- Decide whether you mean one shared experience or separate experiences.
- Choose life for one and lives for multiple separate lives.
Quick examples
The married couple enjoys their life together.
One shared experience → life.
The married couple returned to their separate lives.
Two separate experiences → lives.
Each student should plan for their life after school.
One student at a time → life.
The students prepared for their lives after school.
Several individual futures → lives.
Case Study: Their Life or Their Lives in Real Writing 📝
Imagine an email from a manager after a company relocation.
“I know the move has affected your lives in many ways. I hope the new office gives you more time to enjoy your life outside work.”
The first sentence uses lives because the manager is speaking to several employees and referring to each employee’s individual experience.
The second sentence uses life because the phrase your life outside work can describe each employee’s personal life as a general concept.
Now imagine a couple discussing a move:
“We want to create a better life for ourselves.”
Here, life describes a shared future.
If the sentence said:
“We both changed our lives after moving.”
Then lives would emphasize that each person’s individual life changed.
I once caught a similar issue while editing a workplace newsletter. The writer switched between life and lives in the same paragraph without changing the meaning. Fixing those few words made the message much clearer.
Why Is Their Life Singular but Their Lives Plural?
Life is a singular countable noun. Its standard plural form is lives.
The important spelling rule is that life does not become lifes. Instead, the spelling changes to lives.
Compare:
- one life
- two lives
- a new life
- new lives
- her life
- their lives
This pattern appears in several English words ending in -f or -fe, although not every word follows the same pattern.
The grammar rule is simple here:
Use life when referring to one life. Use lives when referring to multiple lives.
The pronoun their does not force either choice.
Most standard English dictionaries and grammar references recognize life as the singular form and lives as its plural form. The important point for everyday writing is how the noun matches the meaning of your sentence.
Correct vs Incorrect at a Glance
| Sentence | Correct/Incorrect | Why |
|---|---|---|
| They want to improve their lives. | ✅ Correct | Multiple individual lives are meant. |
| She wants to improve their life. | ✅ Correct | One person’s life is meant. |
| They built their life together. | ✅ Correct | One shared life is meant. |
| They built their lifes together. | ❌ Incorrect | The plural spelling is lives, not lifes. |
| They changed there lives. | ❌ Incorrect | Their shows possession; there refers to a place. |
Common Mistakes With Their Life and Their Lives ⚠️
These mistakes usually happen because writers type quickly or do not stop to check the meaning. Autocorrect can also make things worse.
Why mistakes happen
Fast typing: People often type what sounds right without checking the spelling.
Autocorrect: A phone may suggest a word that looks close but does not fit the sentence.
Lack of knowledge: Some learners know that life becomes plural but have not learned that the spelling changes to lives.
Similar-looking words: Their, there, and they’re are easy to mix up.
Similar grammar confusions
| Confusion | Correct Use | Example |
|---|---|---|
| their / there | their = possession; there = place | Their car is over there. |
| their / they’re | they’re = they are | They’re enjoying their trip. |
| your / you’re | your = possession; you’re = you are | You’re enjoying your life. |
| its / it’s | its = possession; it’s = it is | It’s living its own life. |
| life / lives | life = singular; lives = plural | They live different lives. |
Specific mistakes to avoid
| Wrong Form | What’s Wrong | Correct Form |
|---|---|---|
| their lifes | Incorrect plural spelling | their lives |
| there life | Wrong possessive word | their life |
| there lives | Wrong possessive word | their lives |
| they’re life | Contraction means “they are” | their life |
| they’re lives | Contraction cannot show possession | their lives |
| their life’s | Incorrect if you simply mean plural | their lives |
The final example deserves special care. Life’s can be correct when it is a contraction of life is or when it is possessive. It is not the normal plural form.
How Does Life Become Lives? ✍️
The plural of life is lives, not lifes. This is an irregular spelling pattern in English.
The singular form is:
life
The plural form is:
lives
You can see the same difference in common phrases:
- one life
- many lives
- save a life
- save lives
- change a life
- change lives
The spelling can feel strange at first. However, it becomes easier when you learn the pair together.
Think of life → lives as one vocabulary pair rather than trying to build the plural from scratch every time.
Their Life or Their Lives in Different Contexts 📚
The correct choice can change with context because the writer’s intended meaning can change.
| Context | Which Term to Use | Example |
|---|---|---|
| Everyday conversation | Either, depending on meaning | They enjoy their life together. |
| Professional writing | Either, depending on meaning | Employees should balance their lives and work. |
| Creative writing | Either, depending on meaning | They began a new life together. |
| Social media/texting | Either, depending on meaning | Living our best life! |
| Academic writing | Either, depending on meaning | The participants described their lives. |
Everyday conversation
People often use their life for one person’s experience or a shared lifestyle.
“They love their life in the city.”
If you mean the people individually, you might say:
“They have very different lives.”
Professional writing
Professional writing often needs extra clarity.
“The policy affects employees and their lives outside work.”
Here, lives makes it clear that each employee has an individual life.
Creative writing
Writers may intentionally choose one form to shape meaning.
“They built their life beside the sea.”
This suggests unity.
“They went their separate ways and rebuilt their lives.”
This suggests separation.
Social media and texting
Informal writing often uses both forms:
“Living our best life.” ✨
“We all have our own lives.”
The rule does not change just because the writing is casual.
Common Phrases With Life and Lives 🌟
Several everyday phrases naturally use life or lives.
| Phrase | Meaning |
|---|---|
| live your life | Enjoy or manage your own existence |
| change your life | Cause a major personal change |
| save a life | Prevent one person from dying |
| save lives | Prevent multiple people from dying |
| lose your life | Die |
| lose their lives | Die, referring to multiple people |
| build a life together | Create a shared life |
| live separate lives | Have individual lifestyles |
These phrases can help you notice whether the noun should be singular or plural.
For example:
“The couple wants to build a life together.”
But:
“The siblings chose to live separate lives.”
The phrase itself often gives you a clue about the intended meaning.
Can Their Life Refer to More Than One Person?
Yes, but only when the phrase refers to one shared life or one combined existence. This is common with couples, families, or people who share a strong common lifestyle.
For example:
“The couple built their life in a small town.”
The sentence presents their existence as one shared life.
But if you want to emphasize their individual experiences, use lives:
“The couple had very different lives before they met.”
Both sentences can be grammatically correct. The meaning is different.
This is why simply counting the people is not enough.
Can Their Lives Refer to One Person?
Usually, no. If their refers to one person and you mean that person’s one existence, use their life.
For example:
“Every person should be free to live their life.”
Here, each person has one life.
However, a single person can have different lives in a figurative sense if the word refers to separate roles, stages, or versions of experience.
For example:
“The author writes about the many lives of the main character.”
Here, lives is being used in a special, figurative way. It does not mean that the character literally has several biological lives.
For normal grammar questions, though, remember:
One life = life. Multiple lives = lives.
Synonyms and Alternatives for Life and Lives 🔄
Sometimes you can replace life or lives with another word. However, the replacement may slightly change the meaning.
| Alternative | Works When | Does Not Work When |
|---|---|---|
| existence | Talking about someone’s existence | You need a warm, everyday tone |
| lifestyle | Talking about habits or way of living | You mean a person’s whole existence |
| experience | Talking about events or personal experiences | You mean life as a whole |
| world | Talking about someone’s personal world | You need a precise grammar replacement |
| journey | Talking about personal growth or progress | You mean literal daily existence |
For example:
“They changed their lives.”
Could become:
“They changed their lifestyle.”
But the meanings are not identical. A lifestyle is about habits and choices. A life can include everything from relationships to work and personal experience.
Why Getting Their Life or Their Lives Right Matters 🎯
Correct grammar helps readers understand exactly what you mean. The difference between life and lives can change whether readers picture one shared experience or several individual ones.
Clear writing also looks more professional.
Imagine these situations:
| Situation | Why Getting It Right Matters |
|---|---|
| Resume | Shows careful writing skills |
| Client email | Prevents confusion |
| Published content | Builds reader trust |
| Social post | Makes the message easier to understand |
A short sentence can carry a lot of meaning.
“They built their life together.”
This creates a picture of unity.
“They built their lives separately.”
This creates a very different picture.
A useful writing principle is:
Choose the form that matches the meaning you want the reader to see.
That simple habit can prevent many small grammar errors.
How To Remember The Difference 🧠
Use this memory trick:
Life = one. Lives = more than one.
Then ask whether the people have one shared existence or separate experiences.
The one-life test
If you can replace the phrase with:
“one life”
then use life.
Example:
They built their life together.
You can think:
They built one shared life together.
The many-lives test
If you can replace the phrase with:
“separate lives”
then use lives.
Example:
The sisters live their lives differently.
You can think:
The sisters live their separate lives differently.
Remember the spelling
Do not write:
lifes ❌
Write:
lives ✅
The pair to memorize is:
life → lives
When Does Context Change the Answer? 🔍
Context changes the answer because the same group of people can be described as sharing one life in one sentence and having separate lives in another.
Consider a married couple.
“They built their life together.”
The focus is their shared experience.
Now consider:
“Before they met, they lived very different lives.”
The focus is their individual experiences before the relationship.
Neither sentence is automatically more correct. The intended meaning controls the choice.
This is one of the most useful lessons in English grammar: grammar and meaning work together.
A Simple Editing Method for Writers ✏️
When editing your own writing, do not only check whether life or lives looks familiar. Check the entire sentence.
Use this method:
- Circle their.
- Find the noun that follows it.
- Ask whether the noun refers to one life or several.
- Check whether you need life or lives.
- Check their, there, and they’re separately.
For example:
They returned to there lifes.
There are two problems.
First, there should be their.
Second, lifes should be lives.
Correct:
They returned to their lives. ✅
This quick five-step check can catch most errors.
Quick Recap Checklist ✅
Use this checklist whenever you are unsure.
| Question | If Yes → Use |
|---|---|
| Am I talking about one person’s life? | their life |
| Am I talking about one shared life? | their life |
| Am I talking about several separate lives? | their lives |
| Am I describing different individual experiences? | their lives |
| Am I tempted to write “lifes”? | Stop and use lives |
| Am I unsure between “their” and “there”? | Use their for possession |
Practice Examples
1. The couple loves ___ life together.
Answer: their life ✅
2. The three friends returned to ___ separate lives.
Answer: their lives ✅
3. Every student should enjoy ___ life.
Answer: their life ✅
These examples show the main rule clearly.
FAQs About Their Life vs Their Lives
Is “their life” grammatically correct?
Yes. Their life is grammatically correct when their refers to one person’s life or one shared life. For example, “The couple enjoys their life together” describes one shared existence.
Is “their lives” grammatically correct?
Yes. Their lives is correct when you mean multiple separate lives or individual experiences. For example, “The siblings live very different lives” refers to each sibling’s separate experience.
Should I say “their life” or “their lives”?
Use their life for one life or one shared life. Use their lives for multiple separate lives. The meaning of the sentence determines the correct form.
Is “their lifes” ever correct?
No. Lifes is not the standard plural form of life. The correct plural is lives.
Can “their life” refer to two people?
Yes, when the two people are being described as sharing one life or one common existence. For example, “The couple built their life together.”
Can “their lives” refer to two people?
Yes. In fact, this is common when each person has a separate life. For example, “The sisters returned to their lives after college.”
Why is the plural of life “lives”?
Life has the irregular plural lives. You should memorize the pair as life → lives rather than forming the plural as lifes.
Is “they’re life” correct?
No. They’re is short for they are, so it cannot normally show possession. Use their life when you mean a life belonging to them.
Is “there life” correct?
No, not when you mean possession. There usually refers to a place or points to something. The possessive form is their.
How can I quickly remember life vs lives?
Remember: one life, two lives. Then ask whether you mean one shared life or several separate lives. That simple test will solve most cases.
Conclusion: Their Life or Their Lives Made Simple
Their life or their lives becomes easy once you focus on meaning instead of the word their. Use their life when you mean one person’s life or one shared existence. Use their lives when you mean several separate lives or individual experiences.
The spelling is also worth remembering. The plural of life is lives, not lifes. And always keep their, there, and they’re separate in your mind.
When I edit grammar, I find that the best solutions are often the simplest ones. Do not overthink the sentence. Ask one question: Am I talking about one life or several separate lives?
If the answer is one, choose life. If the answer is several, choose lives. That small check can make your emails, essays, articles, and social posts much clearer. 😊
One life, many lives, one simple rule: match the noun to the meaning.
Hi, I’m Lucas Bennett. I’m a grammar content specialist at Grammariva. I work on articles covering everyday grammar questions, sentence usage, and writing tips that readers can apply with confidence.
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