Possessives and Apostrophes
Use apostrophes accurately with singular, plural, joint, and separate possession while distinguishing possessives from contractions.
Learning Objective
Possessives and Apostrophes
Place possessive apostrophes accurately and choose a natural possessive structure for people, organisations, time, and things.
Clear Explanation
Add 's to most singular nouns and irregular plurals; add an apostrophe after a regular plural ending in s. Apostrophes do not form ordinary plurals or possessive pronouns.
Form and Structure
singular noun + 's; regular plural noun + '; irregular plural noun + 's
“The student's notes were clear.”
Style guides differ on singular names ending in s. Choose a consistent house style, such as James's report, unless a required editorial standard says otherwise.
Meaning and Use
Joint possession
When two people share one thing, mark the final name.
“Asha and Leo's office”
Separate possession
When each person owns something separately, mark both names.
“Asha's and Leo's laptops”
Possessive alternatives
An of-phrase is often natural for inanimate relationships, though 's is common with time and organisations.
“the end of the road; a day's work”
Common Errors and Meaning Traps
The teachers room is locked.
The teachers' room is locked.
The room belongs to more than one teacher, so place the apostrophe after plural teachers.
The company changed it's policy.
The company changed its policy.
Its is possessive; it's means it is or it has.
We ordered three pizza's.
We ordered three pizzas.
Do not use an apostrophe to form an ordinary plural.
Guided Practice
Use the grammar in context
“The students' projects were displayed.”
“The children's room is upstairs.”
Write examples of singular, regular-plural, irregular-plural, joint, and separate possession.
Quick Recap
Add 's to most singular nouns and irregular plurals; add an apostrophe after a regular plural ending in s. Apostrophes do not form ordinary plurals or possessive pronouns.
When two people share one thing, mark the final name.
Style guides differ on singular names ending in s. Choose a consistent house style, such as James's report, unless a required editorial standard says otherwise.
The room belongs to more than one teacher, so place the apostrophe after plural teachers.
Independent Mastery Check
Complete these four checks before taking the quiz. If one feels difficult, return to the matching section and try again.
Explain the core rule in your own words without looking back at the lesson.
Find the target form in “The student's notes were clear.” and explain what it communicates in this context.
Explain why “The teachers' room is locked.” is the recommended revision for “The teachers room is locked.”.
Write examples of singular, regular-plural, irregular-plural, joint, and separate possession.
Continue at B1-B2 Level
Aim for at least 5 out of 6 in the quiz below. For every missed answer, read the explanation, return to the relevant section, and try the quiz again.
Which statement best explains Possessives and Apostrophes?
Now Put It Into Practice — Out Loud
Reading grammar is step one. Saying it fluently is step two. Cambridge Veritas AI analyses your speaking in real time — pronunciation, fluency, grammar, and vocabulary.
4,500+ students assessed · 87 countries · Start free
📚 Know someone learning English? Share this lesson with them!
WhatsApp