Ser and estar both mean “to be”, and almost every student I teach trips over them at some point. The rule most books give — ser for permanent things, estar for temporary ones — works until it doesn't: we say está muerto (he is dead), and nothing is more permanent than that.
So in class I use two acronyms instead: DOCTOR for ser and PLACE for estar. Here they are, with the examples I use, the adjectives that change meaning, and a short exercise at the end.
What is the difference between ser and estar?
Ser defines who or what something is: its identity and its essence. Estar describes how or where something is at a given moment: its state, its condition or its location.
SER: the DOCTOR rule
Use ser to talk about what something is in its essence.
| Use | Example | |
|---|---|---|
| D | Description: physical or personality traits | Ella es alta y muy inteligente.She is tall and very intelligent. |
| O | Occupation or profession | Mi hermano es médico.My brother is a doctor. |
| C | Inherent characteristics: colour, material, brand | La mesa es de madera.The table is made of wood. |
| T | Time: hours, dates, days of the week | Hoy es lunes. Son las tres.Today is Monday. It is three o'clock. |
| O | Origin or nationality | Nosotros somos de Perú.We are from Peru. |
| R | Relationship (family, personal) or possession | José es mi primo. El carro es de Juan.José is my cousin. The car is Juan's. |
Golden rule for events. Physical location takes estar, but where and when an event takes place — a concert, a wedding, a match — always takes ser: La fiesta es en mi casa (the party is at my house), El partido es a las 8 (the match is at 8).
ESTAR: the PLACE rule
Use estar to talk about how or where something is in a particular situation.
| Use | Example | |
|---|---|---|
| P | Physical position or posture | El libro está boca abajo. Él está sentado.The book is face down. He is sitting. |
| L | Location of objects, people and places | ¿Dónde está el baño? Madrid está en España.Where is the bathroom? Madrid is in Spain. |
| A | Action in progress (estar + gerund) | Estoy estudiando español en este momento.I am studying Spanish right now. |
| C | Physical condition, health, or the result of a change | El café está frío. La puerta está cerrada.The coffee is cold. The door is closed. |
| E | Emotion or passing mood | Ella está cansada porque hoy está triste.She is tired because today she is sad. |
The trap: adjectives that change meaning
Some adjectives mean something quite different with ser and with estar. These four come up in class all the time:
- ser listo — clever · estar listo — ready
- ser bueno — good-hearted, or of good quality · estar bueno — tasty, or physically attractive
- ser malo — wicked or harmful · estar malo — ill, or tasting bad
- ser aburrido — boring (it bores people) · estar aburrido — bored (right now)
Practise with Lynnea
This is the exercise I use with my students. The story is in Spanish — reading it is part of the practice.
Lynnea es una chica que tiene 25 años. Ella es de Alemania, pero vive en Estados Unidos. Ella es terapeuta; ahora no trabaja porque está en Costa Rica para disfrutar de sus vacaciones, y le gusta estudiar español. También tiene dos hermanos.
Exercise 1 — complete with the right form of SER.
- Lynnea ___ alta y ___ delgada también.
- Los hermanos de ella ___ altos y fuertes.
- La familia de Lynnea ___ interesante.
- Ella dice: «___ (yo) tímida a veces».
Exercise 2 — complete with the right form of ESTAR (location, emotion, or an action happening now).
- Los hermanos ___ en Estados Unidos.
- El papá de Lynnea ___ en Costa Rica.
- La mamá de ella ___ contenta porque su hija ___ estudiando español en Costa Rica.
- Las amigas de ella ___ aburridas porque Lynnea no ___ en Estados Unidos.
- La tía de ella ___ triste porque Lynnea ___ lejos de casa.
- Lynnea ___ cansada porque ___ practicando español por 4 horas.
See the answers
Exercise 1: 1) es, es; 2) son; 3) es; 4) Soy
Exercise 2: 1) están; 2) está; 3) está, está; 4) están, está; 5) está, está; 6) está, está
Why do you say “está muerto” if death is permanent?
Because estar is not about how long something lasts. It describes a state or the result of a change, and being dead is the result of dying. That is exactly why the permanent-versus-temporary rule fails, and why DOCTOR and PLACE work better.
Is it “la fiesta es en mi casa” or “la fiesta está en mi casa”?
La fiesta es en mi casa. When you say where or when an event takes place, you use ser, even though it is a location. Estar is for where people and things are: la casa está en Santa Teresa.
Ser and estar take practice more than memory. If you want to work on them with real conversations, that is a big part of what we do in my classes, online or in person in Santa Teresa.
How the online Spanish classes work →
20 Costa Rican phrases you will hear in Santa Teresa →
Por vs para: when to use each →
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