Possessive Forms of Nouns — English Grammar Exercises
Matt and Jane's new house or Matt's and Jane's? A map of the city or the city's map? Master all possessive forms.
Possessive Forms of Nouns: Quick Reference Guide
English possessive forms cause persistent errors even at upper-intermediate levels. Analysis of the Cambridge Learner Corpus — over 2 billion words of real student writing — shows that apostrophe misuse accounts for roughly 15% of punctuation errors at B1-B2 level. The confusion deepens when learners must choose between 's and of-phrases, handle joint vs separate possession, or navigate time expressions like "yesterday's meeting." Research by Cambridge Assessment found that over 40% of B2 candidates make at least one possessive error in their writing exam. The double genitive ("a friend of mine") is another trouble spot — many learners say "a friend of me" by analogy with their native language. These 60 interactive exercises cover every possessive pattern from basic apostrophe rules to the trickiest edge cases.
Apostrophe Rules: 's vs s'
The core rule is straightforward:
- Singular nouns → add 's: "the dog's bone", "my boss's office"
- Regular plurals (ending in -s) → add just ': "the students' books", "my parents' house"
- Irregular plurals (not ending in -s) → add 's: "the children's toys", "women's rights"
's vs Of-Phrases
Use 's for people, animals, and time:
the cat's tail (animal)
yesterday's news (time expression)
Use of for things and abstract concepts:
the beginning of the story
the result of the experiment
Joint vs Separate Possession
This distinction changes meaning completely:
Matt's and Jane's cars (= each has their own car — separate possession)
Common Mistakes
✗ My parents's house is near the lake. → ✓ My parents' house is near the lake.
✗ The roof of the building's is damaged. → ✓ The roof of the building is damaged.
✗ A friend of me told me. → ✓ A friend of mine told me.
Frequently Asked Questions
When do you use 's vs s' in English possessives?
Add 's to singular nouns (the dog's bone) and irregular plurals that don't end in -s (children's toys, women's rights). Add just an apostrophe (s') to regular plurals ending in -s (the students' books, my parents' house). For singular nouns ending in -s, both forms are acceptable: the boss's office or the boss' office, though 's is more common in modern English.
What is the difference between 's and of-phrases for possession?
Use 's for people, animals, and time expressions (Maria's car, the cat's tail, yesterday's news). Use of-phrases for things and abstract concepts (the roof of the house, the beginning of the story). Some expressions accept both: the company's profits / the profits of the company. When in doubt, 's sounds more natural for people and of sounds more natural for things.
How does joint possession work with apostrophes?
For joint possession (two people own one thing together), add 's only to the last name: Matt and Jane's house (= one shared house). For separate possession (each person owns their own thing), add 's to both names: Matt's and Jane's cars (= they each have their own car). This distinction is important and frequently tested.
What is the double genitive in English?
The double genitive combines 'of' with a possessive form: a friend of mine, a colleague of John's, that idea of yours. It's used when the possessor is a person (not a thing) and the possessed item is one of several. You say 'a friend of mine' (= one of my friends), not 'a friend of me'. This pattern is very common in spoken English.