Ser vs. Estar
Portuguese has two verbs for "to be". Ser describes essence, identity, and permanent qualities. Estar describes states, locations, and temporary conditions. Choosing between them is one of the first major decisions a Portuguese learner makes, and the wrong choice changes meaning rather than just sounding off.
Portuguese has two verbs that both translate as English “to be”: ser and estar. Choosing between them is one of the first major decisions a learner makes. The wrong choice does not just sound foreign. It changes meaning.
Ele é aborrecido. — He is boring. Ele está aborrecido. — He is bored.
Same English verb. Two completely different statements. This is what makes ser-versus-estar load-bearing in Portuguese, and worth learning carefully on day one.
The core distinction
The traditional rule is: ser for essence, estar for state.
- Ser describes who or what something is. Identity, profession, nationality, origin, defining qualities, time, possession.
- Estar describes how something currently is. Location, mood, temporary condition, ongoing action, weather.
A finer way to think about it: ser is for things that define an entity, estar is for things that could change without changing the entity itself. A wall is white (ser) because being white is part of what the wall is. A wall is wet (estar) because the wet will dry and the wall will still be the wall.
Forms — present tense
| ser | estar | |
|---|---|---|
| eu | sou | estou |
| tu | és | estás |
| ele/ela/você | é | está |
| nós | somos | estamos |
| vós | sois | estais |
| eles/elas/vocês | são | estão |
Both verbs are heavily irregular. Memorise them as units. They appear in every Portuguese sentence about identity, location, or state.
Forms — pretérito perfeito
| ser | estar | |
|---|---|---|
| eu | fui | estive |
| tu | foste | estiveste |
| ele/ela | foi | esteve |
| nós | fomos | estivemos |
| eles | foram | estiveram |
Note: fui is also the past of ir (to go). Context distinguishes the two.
Forms — pretérito imperfeito
| ser | estar | |
|---|---|---|
| eu | era | estava |
| tu | eras | estavas |
| ele/ela | era | estava |
| nós | éramos | estávamos |
| eles | eram | estavam |
The imperfeito of ser (era) and estar (estava) does most of the work in Portuguese description. Almost every paragraph of background prose contains them.
When to use ser
1. Identity and definition
Eu sou professora. — I am a teacher. Lisboa é uma cidade portuguesa. — Lisbon is a Portuguese city.
Who or what someone or something is.
2. Nationality and origin
Ele é português. — He is Portuguese. Nós somos do Porto. — We are from Porto.
3. Profession
A minha mãe é médica. — My mother is a doctor.
4. Inherent qualities
A neve é fria. — Snow is cold. O céu é azul. — The sky is blue.
Things that are true of the thing by nature.
5. Time and date
São três horas. — It is three o’clock. Hoje é segunda-feira. — Today is Monday. É 1 de janeiro. — It is the first of January.
Always ser for clock time and calendar dates.
6. Possession (with de)
Este livro é do João. — This book is João’s.
7. Material
A mesa é de madeira. — The table is made of wood.
8. Events and their locations
A festa é em minha casa. — The party is at my house.
A subtle case: an event location uses ser, not estar. The party itself is at the house. (Compare: a comida está em minha casa — the food is at my house, with estar because food is a thing, not an event.)
When to use estar
1. Location of things and people
Ela está em Lisboa. — She is in Lisbon. O livro está na mesa. — The book is on the table.
A person or object’s current position.
2. Temporary state, mood, condition
Estou cansado. — I am tired. Eles estão felizes. — They are happy. Ela está doente. — She is sick.
How someone feels right now.
3. Weather
Está calor. — It is hot. (the weather) Está a chover. — It is raining.
Always estar for weather conditions.
4. Ongoing action (estar a + infinitive / estar + gerund)
European Portuguese: estar a + infinitive. Brazilian Portuguese: estar + gerund.
EP: Estou a ler um livro. BP: Estou lendo um livro.
Both mean I am reading a book.
5. Result of a change
A janela está aberta. — The window is open. (someone opened it) A porta está fechada. — The door is closed.
Past participles used as adjectives almost always take estar.
6. With com for temporary possession or feeling
Estou com fome. — I am hungry (literally: I am with hunger). Está com pressa. — He is in a hurry.
A common Portuguese pattern, especially in Brazilian Portuguese.
The meaning-shift adjectives
Some adjectives change meaning entirely depending on the verb.
| Adjective | with ser | with estar |
|---|---|---|
| aborrecido | boring | bored |
| chato | annoying | annoyed |
| atento | attentive (by nature) | paying attention (now) |
| bom | good (quality) | well, recovered |
| mau | bad (quality) | feeling unwell |
| pronto | clever, sharp | ready |
| vivo | lively, sharp | alive |
| morto | dead (figuratively, like tired) | dead |
| rico | rich (wealthy) | wonderful, delicious |
| esperto | clever | awake, alert |
Ele é esperto. — He is clever. Ele está esperto. — He is alert / awake.
These pairs are the trap that even advanced learners fall into. Memorise them as fixed expressions.
Estar a + infinitive vs. estar + gerund
European Portuguese strongly prefers estar a + infinitive for ongoing action. Brazilian Portuguese uses estar + gerund.
EP: Ela está a falar. BP: Ela está falando.
Both mean She is speaking. Both are correct in their varieties. Confusing them marks you as the speaker of the other variety, but does not cause misunderstanding.
Brazilian tá
In casual Brazilian speech, está is often shortened to tá.
Tá bom? — Is it good? / OK? Tô cansado. — I’m tired.
This is informal speech only. Never appears in writing outside dialogue.
What you don’t need to do
You don’t need to memorise the 30-item list of “always ser” and “always estar” expressions on day one. Start with the core categories. The edge cases come with reading.
You don’t need to use estar for every English “is”. Time, profession, identity, nationality all take ser. Beginners over-use estar because location and mood are concrete and easy to picture.
You don’t need to worry about the meaning-shift adjectives at A1. É bom (it’s good) vs. está bom (it’s fine, OK) — both work most of the time. The full meaning-shift list is a B1 problem.
Common confusions
- Ser para identity, estar for location. Ela é professora (identity) vs. ela está na escola (location).
- Weather is estar. Está calor, not é calor.
- Event locations use ser. A festa é em minha casa. The party as event takes ser.
- Past participle as adjective takes estar. A porta está fechada, not é fechada.
- Meaning shifts. Ele é aborrecido (he is boring) vs. ele está aborrecido (he is bored).
- Estar with com for feelings. Estou com fome (I’m hungry), estou com sede (I’m thirsty).
Where you’ll meet it in the library
The ser-estar split runs through every Portuguese page:
- Pinóquio (A1+) — Storica’s adaptation alternates the two verbs constantly. Pinóquio’s identity (era um boneco) versus Pinóquio’s mood (estava triste).
- Alice no País das Maravilhas (A2+) — Carroll’s descriptions are a steady drill of the two verbs. The rabbit is white (ser) and in a hurry (estar).
- Dom Quixote (A2+) — Cervantes’s character portraits in Portuguese rendering build identity through ser and ongoing action through estar.
For canonical Portuguese-original prose, Eça de Queirós and Saramago both work this distinction at high resolution. Os Maias alone could be used as a ser-estar textbook for advanced learners.
Where you'll see this in books.
Pinóquio era um boneco de madeira. Não estava feliz na sua casa pequena. Gepetto era pobre, mas era um homem bom. A oficina estava sempre cheia de aparas de madeira.
Alice estava cansada. O dia estava quente. A irmã era mais velha e era muito séria. O coelho era branco e estava com muita pressa.
Dom Quixote era um fidalgo de La Mancha. Era alto, magro, e estava sempre a ler livros de cavalaria. A sua biblioteca estava cheia de romances antigos. Sancho era pequeno, gordo, e estava sempre com fome.