You already know the five kinds of nouns and the basic pronouns. This Masterclass tackles the traps Olympiad papers love: when a collective noun takes a singular verb, how the possessive case really works, and pronouns that must always stay singular.
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A collective noun names a whole group with one word. Whether it takes a singular or plural verb depends on how the group is acting.
📌 Collective noun agreement
Unity sense: when the group acts as ONE body, use a singular verb — "The jury has reached a unanimous decision."
Individuality sense: when the members act separately, use a plural verb — "The jury are arguing among themselves."
Stay consistent: once you pick a sense, every verb and pronoun in that sentence must match it.
✨ The possessive case — three everyday forms
Apostrophe + s
for people, animals and time
Riya's book · the dog's tail · a week's holiday
Of-phrase
for lifeless things
the roof of the house — not "the house's roof"
"Each", "either" and "neither" are always singular, however many nouns follow them. Relative pronouns can also carry a preposition — a pattern that trips up most students.
Distributive rule: "Each of the boys has brought his own lunch." Not "have… their" — "each" stays singular no matter how many boys there are.
📊 Relative clauses with a preposition
| Everyday form | Formal Olympiad form |
|---|---|
| The man who I spoke to is my uncle. | The man to whom I spoke is my uncle. |
| The pen which I write with is blue. | The pen with which I write is blue. |
| The house which she lives in is old. | The house in which she lives is old. |
Two rare possessive patterns show up almost every year in the Achievers section.
🏆 Two rare possessive patterns
Double possessive: "a friend of my father's" — used when the possessed noun is indefinite (a/an/some) and already has "of".
Group genitive: when the possessor is a phrase, 's attaches to the LAST word only — "the King of Bhutan's visit", never "the King's of Bhutan visit".
Before a gerund: use the possessive — "I appreciate your coming on time," not "you coming".
Pro tip: Achievers questions often stack two rules in one sentence — a collective noun AND a possessive, or a distributive pronoun AND a relative clause. Check each rule separately before choosing.
12 IEO-pattern questions on nouns and pronouns, including two Achievers-level questions.
