What this is
Être is the verb to be, and it is the most irregular verb in French — its forms share almost no letters with each other or with the infinitive. That is the price of being the most-used verb in the language: high-frequency words wear down into odd shapes and stay there.
Learning être is not really about the six forms. It is about the two things that happen around them: the adjective behind it changes to match the subject, and the article English insists on in front of a job title disappears.
The rule
| pronounced | ||
|---|---|---|
| je | suis | swee |
| tu | es | ay |
| il / elle / on | est | ay |
| nous | sommes | som |
| vous | êtes | zet (with the liaison) |
| ils / elles | sont | son |
Tu es and il est are homophones — both are just ay after the pronoun. Only the pronoun tells you who is being talked about, which is one more reason French cannot drop its subject pronouns.
Anything you put after être to describe the subject must agree with it:
| masculine | feminine | |
|---|---|---|
| singular | il est grand | elle est grande |
| plural | ils sont grands | elles sont grandes |
Add -e for feminine, -s for plural, both for feminine plural. Adjectives already ending in -e (malade, jeune) don’t take a second one; adjectives already ending in -s (anglais, français) don’t take a second one in the masculine plural.
Why it works this way
The strange shapes come from Latin esse, which was already irregular then, blended with forms of a second verb, stare. French inherited the mess and sanded it down further: sont and sommes descend from one root, est and es from another, suis from a third.
Agreement is the opposite story — it is the system working exactly as designed. French marks gender and number everywhere it can: on the article, on the noun, and on any adjective that describes it. Most of those markings are silent, so agreement often only exists on paper. That is why it feels optional to an English speaker and is not: write elle est grand and you have written a spelling error that a French reader hears as a mistake even though a French listener would not.
Edge cases
vous êtes carries an obligatory liaison
The s of vous is silent — except before a vowel, where it wakes up as a z and attaches to the next word. Vous êtes is pronounced vou-zêtes, as one unit. This liaison is not stylistic; leaving it out is heard as an error, not an accent. The same happens in nous aimons (nou-zaimons) and ils ont (il-zont).
Adjectives after être agree with the subject
Il est grand / elle est grande / ils sont grands / elles sont grandes. Sometimes the agreement is audible: petit → petite wakes up a t, intelligent → intelligente wakes up a t, gentil → gentille produces a y sound. Sometimes it is completely silent: fatigué → fatiguée sound identical. Silent or not, it has to be written.
With on meaning we, the two halves of the sentence disagree on purpose: the verb follows the form of on and stays singular, while the adjective follows its meaning and goes plural. On est américains.
Je suis étudiant takes no article
English says I am a doctor. French says Je suis médecin — no un, no une. After être, a profession, a religion, a nationality or a status is treated as a description of the subject rather than as a thing the subject is one of. Adding the article is the single most common beginner error here, and it is audible immediately.
The article comes back the moment you use c’est instead: c’est un médecin is correct, and so is il est médecin. Both exist, they take different structures, and the next concept is entirely about choosing between them.
Nationalities are lowercase as adjectives, capitalized as nouns
Il est français — lowercase, because it is an adjective describing him. C’est un Français — capitalized, because it is now a noun naming a member of a group. The capital letter is the only difference between the two words, and it is not decorative: it tells you which structure the sentence is using. Languages, incidentally, are always lowercase: je parle français.
What English speakers get wrong here
The article after être is the big one: je suis un ingénieur is instantly non-native. Drop it.
The second is treating agreement as optional because it is usually inaudible. It isn’t optional — and roughly a third of the time it is audible, so a wrong ending will be heard.
The third is skipping the liaison in vous êtes, which produces a hesitant vous… êtes that sounds like two separate words. Glue them together.
And the fourth is reaching for être where French uses avoir: I am twenty, I am hungry, I am cold are all avoir sentences in French. That is the next concept.