Both life and lives are correct English words, but they do not normally serve the same grammatical purpose.
Use life when referring to one person’s or one thing’s existence, or when life is used as a general uncountable concept.
Use lives when referring to two or more individual lives.
The basic difference is singular versus plural, but context matters. Phrases such as our life, our lives, their life, and their lives require more than simply checking whether the people involved are singular or plural.
Quick Answer
Use life for one individual life:
- She built a happy life in Chicago.
- His life changed after college.
Use lives for more than one individual life:
- The program changed many lives.
- Their lives became much busier after the move.
Use life without making it plural when it refers to existence or living in a general, uncountable sense:
- Life can be unpredictable.
- Scientists study marine life.
- The neighborhood offers a good quality of life.
The deciding question is not simply “Is the subject plural?” Ask whether you mean one life, several separate lives, or life as a general concept.
What Is Correct?
Both forms are correct in the right context.
| Form or Pattern | Best Use | Why |
|---|---|---|
| life | One individual life | It is the singular countable form |
| lives | Two or more individual lives | It is the plural form of life |
| life | Existence or living as a general concept | It can function as an uncountable noun |
| our/their lives | Separate individual experiences | Each person has an individual life |
| our/their life | One genuinely shared life or singular-person reference | The context presents life as one shared whole or refers to one person |
For example:
The accident changed his life.
One person is involved, so singular life fits.
The accident changed their lives.
Several people were affected individually, so plural lives is natural.
Technology has changed modern life.
Here, life refers broadly to the way people live. It is not counting individual lives.
The Core Grammar Rule
As a countable noun, life has an irregular plural:
life → lives
The final f changes before the plural ending is added.
- one life
- two lives
- several lives
- many lives
When these nouns are sentence subjects, their number also affects verb agreement:
- Life is precious.
- A life was saved.
- Lives are at risk.
- Several lives were saved.
However, life is not always a countable singular noun.
It can also refer generally to existence, living things, or a way of living:
- Life exists in many environments.
- College life can be stressful.
- City life is not for everyone.
In those uses, adding -s would change the intended meaning rather than simply “fix” the grammar.
When Each Form Is Correct
Use life when one person, animal, or other individual entity has one life.
- She devoted her life to teaching.
- The veterinarian saved the dog’s life.
- Everyone deserves the chance to build a better life.
Notice the last example. Everyone is grammatically singular, so their life can also be correct with singular they:
- Everyone should make their own choices in life.
- Everyone wants their life to matter.
Use lives when several people or beings have individual lives.
- Nurses improve patients’ lives every day.
- The new policy affected thousands of lives.
- The students returned to their normal lives after summer break.
With plural groups, their lives or our lives is usually the natural choice when each person has an individual existence or personal experience.
A singular form can still appear when the context deliberately presents something as one shared experience:
- We built a life together.
- They began a new life as a family.
Fast Choice Block
- One individual: life
- Several individuals: lives
- Life in general: life
- Several people’s separate experiences: their lives
- One shared way of living: a shared life or their life, when the context clearly supports that meaning
When It Is Incorrect or Less Natural
Using life where several separate individual lives are meant can sound incorrect or unnatural.
Less natural:
The firefighters risked their life to rescue the family.
Better:
The firefighters risked their lives to rescue the family.
Each firefighter has an individual life, so the plural is clearer.
Another common error is lifes:
Incorrect:
The treatment saved many lifes.
Correct:
The treatment saved many lives.
Do not assume, however, that every sentence involving several people automatically needs lives.
Correct:
The city invested in programs designed to improve quality of life.
Here, life belongs to the fixed idea quality of life. The sentence is not counting individual lives.
Meaning, Structure, or Emphasis Differences
Sometimes both singular and plural structures are possible, but they create different emphasis.
Consider:
They built a life together.
This presents the couple’s shared existence as one combined experience.
Now compare:
They went on with their lives.
This focuses on the individuals and their separate experiences.
Similarly:
The move changed our lives.
The change affected each person individually.
We started a new life together.
The speakers describe their new shared existence as one whole.
Therefore, the distinction is not merely mechanical agreement with words such as we or they. The noun must match the meaning the sentence expresses.
Real-World Examples
Personal life
- Moving across the country changed my life.
- My grandparents have lived interesting lives.
Family
- They built a peaceful life together in Oregon.
- Having children changed their lives.
Education
- College life requires more independence.
- Scholarships can transform students’ lives.
Work
- She spent most of her working life in healthcare.
- Flexible schedules have improved many employees’ lives.
Safety
- The paramedic helped save a life.
- Smoke alarms save lives.
General concepts
- Modern life moves quickly.
- Scientists continue searching for signs of life beyond Earth.
Common Mistakes (and Quick Fixes)
One frequent mistake is treating life’s as a plural.
Life’s is not the regular plural of life.
It can show possession:
- One of life’s challenges is uncertainty.
It can also represent a shortened form in contexts such as:
- Life’s too short.
Meaning: Life is too short.
The plural noun is lives, without an apostrophe.
Another mistake is confusing plural noun lives with the verb lives:
- Their lives changed. — plural noun
- Maria lives in Boston. — verb
The spelling is the same, but the grammatical function is different.
Grammar Rule Details
Rule
When life is a countable noun, use life for one and lives for more than one.
Do not form the ordinary plural as lifes.
When life expresses existence, a general way of living, or another uncountable concept, it can remain singular in form without referring to exactly one individual.
Correct Usage
Correct singular countable uses include:
- He lived a long life.
- Her life changed completely.
Correct plural uses include:
- They lived long lives.
- The storm disrupted many lives.
Correct uncountable or general uses include:
- Life is complicated.
- Rural life appeals to some people.
- The lake supports abundant plant life.
Incorrect or Less Natural Usage
Incorrect:
Several lifes were saved.
Correct:
Several lives were saved.
Less natural when referring to several individuals:
The workers risked their life.
More natural:
The workers risked their lives.
However, singular life should not be changed to lives merely because another noun in the sentence is plural:
Residents want a better quality of life.
That sentence is already natural and correct.
Examples
- One life was lost, but several lives were saved.
- Reading changed her life.
- Great teachers can influence their students’ lives.
- We want to build a good life together.
- Technology affects nearly every part of modern life.
- After graduation, the friends went on to lead very different lives.
Common Mistakes
The three forms most often confused are:
life — singular noun or general uncountable noun
lives — plural noun, or separately a form of the verb live
life’s — possessive form or contraction
Check the grammatical job before choosing the spelling.
Exceptions
There is no normal exception to the standalone plural rule:
one life → two lives
However, an established compound can follow its own plural pattern. The art term still life becomes still lifes, not still lives, when referring to multiple works of art in that category.
This does not change the ordinary plural of the standalone noun life.
Quick Test
Ask three questions:
Am I talking about one individual existence?
Use life.
Am I talking about several individual existences?
Use lives.
Am I talking generally about existence or a way of living rather than counting individuals?
Use life.
Usage Notes
With we, they, people, and other plural references, lives is usually natural when each person has an individual life:
- We changed our lives.
- People value their lives.
Singular life remains possible when the sentence refers to one shared existence or a general concept:
- We built a life together.
- Technology is part of everyday life.
Context determines which meaning you need.
FAQ
Is life singular or plural?
Life is normally the singular form when it refers to one individual existence. Its plural is lives. However, life can also function as an uncountable noun when referring generally to existence or a way of living, as in modern life or marine life.
Is it our life or our lives?
Usually use our lives when referring to the individual lives of several people: “The decision changed our lives.”
Use singular wording when describing one shared existence: “We built a life together.” The intended meaning determines the number.
Is it their life or their lives?
Use their lives when their refers to several people with separate individual lives: “The students returned to their lives after graduation.”
Their life can be appropriate when their refers to one person through singular they or when context clearly presents one shared life.
Is lifes ever the correct plural of life?
No. When the standalone noun life becomes plural, the standard form is lives.
Write “one life” but “many lives.”
Do not confuse this rule with established compound forms such as still lifes.
What is the difference between life’s and lives?
Lives is the plural noun in a sentence such as “The program saved lives.”
Life’s contains an apostrophe. It can show possession, as in “life’s challenges,” or represent a contraction such as “life’s short” for “life is short.” It is not the plural form of life.
Conclusion
The choice between life or lives depends mainly on number and meaning.
Use life for one individual life or when discussing life as a general, uncountable concept. Use lives when referring to two or more individual lives.
Remember the simplest test:
One individual life → life
Multiple individual lives → lives
Life as a general concept → life
For phrases such as our life, our lives, their life, or their lives, do not choose the form only by looking at the pronoun. Decide whether the sentence describes one shared existence, separate individual experiences, or life in a general sense.
