Possessive adjectives: quick practical rules

Before you write or speak, determine who actually possesses or connects with the object. English possessive adjectives always reflect the person or group that owns something, not the gender or number of the item itself. If Maria owns three cars, you say her cars because Maria is female and singular. If five technicians share one computer, you say their computer because the owners form a plural group. Checking the owner first prevents confusion with pronouns from other languages.

A possessive adjective cannot stand on its own at the end of a sentence. It functions like an article, pointing straight toward a noun or a noun phrase. You can insert descriptive adjectives between the possessive word and the noun, but the noun must appear somewhere in the phrase. For instance, you can say our tickets or our VIP tickets, but you cannot say the tickets are our. When the noun is absent, English requires a possessive pronoun instead.

You can practise this again in Possessive and Reflexive Pronouns: Practical Usage Guide and When to Use The: Practical English Rules.

When a single person, animal, or object owns something, select his, her, or its based on that specific entity. Use his for a man or boy, her for a woman or girl, and its for a business, device, place, or animal when the sex is unspecified. Learners often mistakenly match the pronoun to the object being owned, saying her father when speaking about a man. Always look backward to the owner to choose the correct third-person singular word.

To choose between its and it's, try expanding the word to it is or it has. If either fits, use it's. If the word shows possession or a connection to a thing, organization, or animal, use its without an apostrophe.

When more than one person owns or shares something, choose between our and their by deciding whether you belong to the group. Use our when you are speaking for yourself and at least one other companion: our neighborhood, our budget, or our goal. Use their when describing a separate group of people, animals, companies, or things that does not include you. Using their also works in modern English when referring to a single individual whose gender is unknown or irrelevant.

In many European and Romance languages, possessive words change their endings to agree with plural nouns. In English, possessive adjectives never change form. Whether you are talking about one passport or five passports, the word remains your, her, his, our, or their. Writing ours friends or theirs bags is an error that distracts native listeners. Keep the possessive word singular in appearance, and let the noun carry any plural marker such as -s or -es.

Do not confuse possessive adjectives with possessive pronouns. Possessive adjectives must sit in front of a noun: my car, your turn, her idea, our office, their house. Possessive pronouns replace the entire noun phrase and stand alone: mine, yours, hers, ours, theirs. His can function as both an adjective and a pronoun, while its rarely appears alone. When you see a noun immediately following the slot, pick the adjective. When the noun has already been stated, choose the standalone pronoun.

In natural conversational English, possessive adjectives rarely receive heavy sentence stress. Words like your, our, and his frequently reduce to short, weak pronunciations. Your often sounds like /jər/, our frequently rhymes with are /ɑːr/, and the initial /h/ in his or her may disappear entirely in rapid connected speech after a consonant. Training your ear to recognize these reduced forms helps you follow conversations and write accurate transcripts without missing unstressed grammatical markers.