Where it appears in the exam
What is it?
Possessives and pronouns say what belongs to whom and what each word refers back to. English marks the owner inside the word itself — his, her, its, their — and separates with an apostrophe what something owns from what something is: 'its' versus 'it's', 'whose' versus 'who's'.
Why it matters in the exam
This is the competency in the family with the widest presence in Part 2: «whose», the genitive apostrophe and the independent possessive are routine gaps, and every one of them is written rather than chosen from options. That changes the difficulty entirely: with no four alternatives in front of you to signal that a decision exists, the default form comes out. In longer texts it does another job: it is what tells you who is being talked about when a paragraph holds three people.
The cognitive trap
"The instinct: one all-purpose possessive, the possessive placed after the noun, and a preposition wherever English wants an apostrophe."
Why your brain does this: many languages use a single possessive regardless of the owner's gender or number, and express every kind of belonging with one preposition. None of that has to survive translation, and the apostrophe in particular has no equivalent to fall back on.
his / her / its / their / your house · the architect whose designs… · a friend of mine · a month's notice
The English rule: mark who owns, use the independent form after 'of', and use an apostrophe with time expressions. How it matters in the exam: Part 1 offers four forms of one pronoun, so only the syntactic slot can separate them.
Recognition pattern
In the exam, look for the key signal first. The answer follows.
What decides each form
<strong>It's</strong> been raining since Tuesday. · <strong>It's</strong> the only option left.
The company changed <strong>its</strong> logo. · The theory has <strong>its</strong> critics.
the architect <strong>whose</strong> designs · the novel <strong>whose</strong> ending divided readers
the architect <strong>who</strong> designed the museum
a colleague of <strong>mine</strong> · that habit of <strong>yours</strong>
the manager<strong>'s</strong> office · a month<strong>'s</strong> notice · two weeks<strong>'</strong> holiday
the end <strong>of</strong> the film · the roof <strong>of</strong> the building
She taught <strong>herself</strong> to code. · They did it <strong>themselves</strong>.
The six that recur most
The company changed it's logo last year.
'It is logo' means nothing. It is the most frequent written error in English and it shows immediately in Writing.
The company changed its logo last year.
Possessive: no apostrophe. 'It is' does not fit here, so it does not take one.
The novelist who's book won the prize lives nearby.
'Who is book' does not work. The substitution test applies exactly as it does to its/it's.
The novelist whose book won the prize lives nearby.
A possessed noun ('book') follows the relative → whose.
She's a colleague of me from university.
The object pronoun marks no possession. English requires it to be marked even after 'of'.
She's a colleague of mine from university.
After 'of' comes the independent form: mine, yours, hers, ours, theirs.
They must give a month notice before resigning.
Without the apostrophe, 'month' reads as an adjective and the phrase is incomplete. Plural: 'two weeks' notice'.
They must give a month's notice before resigning.
Periods of time take the genitive apostrophe, exactly as people do.
She finished the report by her own.
This blends 'by herself' and 'on her own', which are the two correct forms.
She finished the report herself.
Emphatic reflexive: she did it, with no help.
Every students should bring their own laptop.
The problem is not 'their' but 'every students': 'every' requires a singular noun.
Every student should bring their own laptop.
Singular 'their' is acceptable and natural when gender is not marked.
Why your brain gets it wrong
The learner's short circuit
Analyse the trap by exam format
The architect ______ designs transformed the city centre died almost unknown.
'Architect' is a person, and the rule everyone memorises is 'person → who'. But that rule settles the subject, not possession. What transformed the city was not the architect: it was his designs. The relative has to express that the designs are his, and only 'whose' does that.
designs (a noun, not a verb)
Look at what sits immediately after the gap. A noun → whose. A verb → who. It is a one-second check and it never fails: 'whose designs transformed' versus 'who designed'.
→ whose
A good rule answering the wrong question
'Person → who' is true, and here it is useless, because the gap does not ask who but whose. A correct rule applied to the wrong question is more dangerous than no rule at all.
Strategy
In any relative gap, settle the FUNCTION first: subject (who/that), object (who/which/that) or possession (whose). Only then consider whether it is a person or a thing.
She showed me a photograph of the coast taken by a colleague of ______ many years ago.
After a preposition the reflex is the object pronoun: «of me», like «with me» or «for me». It works with every preposition except this one, because here «of» does not introduce a complement but a POSSESSION, and possession has its own form.
a colleague of
What comes before is «a colleague», a noun with an indefinite article. That combination — article + noun + of + possessive — is the double genitive, and it requires the independent form.
→ mine
A preposition that takes no complement
«A friend of mine» is the only way English has of saying one of my friends without counting them. That is why the form is possessive rather than object.
Strategy
If there is an indefinite article or a demonstrative in front of the «of» (a friend of…, that book of…), what follows is mine, yours, hers, ours or theirs.
Employees with more than five years of service are entitled to three ______ paid leave each year.
Time does not feel like an owner, so the apostrophe never comes to mind: the plain plural gets written. And most languages express the idea with a preposition — «three weeks OF leave» — which is exactly what English refuses to do here.
three
After the number comes a period of time, and after the period a noun with no preposition. That sequence — number + time + noun — is always genitive: a day’s work, two weeks’ holiday, six months’ notice.
→ weeks'
In the plural the apostrophe goes AFTER the s
With one period it is a week’s holiday; with several, two weeks’ holiday, apostrophe after the s. The s is not repeated.
Strategy
If you can slip «of» between the two words and the meaning holds, English uses the genitive: three weeks of leave → three weeks’ leave.
Possessives & pronouns (its/their/whose) is 1 of 82
The exam tests 82 grammar competencies across 19 families. Mastering one is the first step. Automating all 82 is passing.
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