Mixed Possessives and Ellipsis — English Grammar Exercises
my/mine, your/yours, their/theirs — know the difference
Mixed Possessives and Ellipsis
At B2 level, the challenge is no longer knowing the individual rules in isolation but applying them fluently when possessives appear in context — especially when noun ellipsis (dropping a noun to avoid repetition) forces a switch from adjective to pronoun form. Corpus analysis of B2-level learner writing shows that pronoun-adjective errors increase in ellipsis contexts, where learners must track what noun has been omitted rather than simply reading the local syntax.
Ellipsis: Dropping the Noun
When a noun is repeated in a second clause, English typically replaces it with a possessive pronoun:
Her presentation was good, but I think ours was better. (ours = our presentation)
Our hotel was comfortable, but theirs had a better pool. (theirs = their hotel)
I've finished my homework. Have you finished yours? (yours = your homework)
Multi-Error Texts
Real texts combine multiple possessive patterns. A single paragraph may require recognising adjective-pronoun switches, the 'of mine' construction, 'own' patterns, and its/it's at the same time:
✓ A friend of mine just got her own apartment. It's in the city centre, and she chose all the furniture on her own.
Common Mistakes
✗ My salary is lower than her. → ✓ My salary is lower than hers.
✗ A friend of me lives here. → ✓ A friend of mine lives here.
✗ She did it by her own. → ✓ She did it on her own.
Frequently Asked Questions
What is the difference between possessive adjectives and possessive pronouns?
Possessive adjectives (my, your, his, her, its, our, their) come before a noun and modify it: 'Is this your bag?' Possessive pronouns (mine, yours, his, hers, ours, theirs) stand alone and replace the noun to avoid repetition: 'I forgot my umbrella. Can I borrow yours?' The key test: if a noun follows immediately, use the adjective form. If the noun is omitted, use the pronoun form. Note that 'his' and 'its' serve as both adjective and pronoun.
What does 'a friend of mine' mean, and why not 'a my friend'?
'A friend of mine' is the double possessive (or post-genitive) construction meaning 'one of my friends'. English does not allow a possessive adjective after an indefinite article: 'a my friend' is ungrammatical. The pattern is: indefinite article + noun + of + possessive pronoun (mine/yours/his/hers/ours/theirs). Compare: 'I bumped into a colleague of hers' (one of her colleagues). After 'of', always use the pronoun form, not the adjective: 'of mine', not 'of my'.
What is the difference between 'its' and 'it's'?
'Its' (no apostrophe) is the possessive adjective, showing that something belongs to it: 'The company changed its logo.' 'It's' (with apostrophe) is a contraction of 'it is' or 'it has': 'It's raining' (= it is raining); 'It's been a long day' (= it has been). The test: expand the contraction. If 'it is' or 'it has' makes sense, write 'it's'. If not, write 'its'. This is one of the most common spelling errors at B1–B2 level in learner corpora.
How do I use 'own' in English — 'my own', 'on my own', or 'of my own'?
'Own' always follows a possessive adjective and adds emphasis on exclusive or personal possession. Three patterns: (1) possessive + own + noun for emphasis: 'She has her own room' (not shared); (2) on + possessive + own = alone, without help: 'He did it on his own' (never 'by his own'); (3) a/some + noun + of + possessive + own = something that personally belongs to someone: 'They want a house of their own'. Note: 'an own car' is wrong — 'own' always needs a possessive adjective before it.