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Spanish grammar - Because' - porque, ya que, puesto que and como

Because' - porque, ya que, puesto que & como

There are three common ways to say 'because' in Spanish:

porque - very commonly used to mean 'because'.

ya que - also common, used similarly to 'since' or 'because'.

puesto que - used in more formal contexts but still found in colloquial speech.

These can often be used interchangeably, but porque cannot start a sentence.

como means 'given that', 'as', or 'since'. It typically begins a sentence to set up a reason for some result.

Examples:
El perro ladra porque ve a un extraño.
The dog barks because it sees a stranger.

perro means 'dog'

ladrar means 'to bark'

ve means 'sees'

extraño means 'stranger'

La tienda cierra porque no hay clientes.
The store closes because there are no customers.

tienda means 'store'

hay means 'there are'

clientes means 'customers'

Los niños juegan en el parque porque hace buen tiempo.
The children play in the park because the weather is nice.

buen tiempo means 'nice weather'

El profesor explica lentamente porque los estudiantes no entienden.
The teacher explains slowly because the students don't understand.

explicar means 'to explain'

lentamente means 'slowly'

Los empleados trabajan horas extra porque hay mucho trabajo.
The employees work overtime because there is a lot of work.

empleados means 'employees'

horas extra means 'overtime'

hay means 'there is'

mucho trabajo means 'a lot of work'

El gato duerme porque está cansado.
The cat sleeps because it is tired.

dormir means 'to sleep'

cansado means 'tired'

El coche no arranca porque la batería está descargada.
The car doesn't start because the battery is dead.

arrancar means 'to start'

batería means 'battery'

descargada means 'dead'

La película empieza tarde porque hay problemas técnicos.
The movie starts late because there are technical problems.

problemas técnicos means 'technical problems'

La familia no sale de vacaciones porque quiere ahorrar dinero.
The family doesn't go on vacation because they want to save money.

familia means 'family'

vacaciones means 'vacation'

ahorrar means 'to save'

El restaurante está vacío porque es muy caro.
The restaurant is empty because it is very expensive.

restaurante means 'restaurant'

vacío means 'empty'

es means 'is'

muy caro means 'very expensive'

El jefe está contento, ya que el proyecto está terminado.
The boss is happy since the project is finished.

ya que means 'since'

terminado means 'finished'

Los estudiantes estudian, ya que tienen un examen mañana.
The students study since they have an exam tomorrow.
Las plantas crecen rápido, ya que reciben mucha luz.
The plants grow quickly since they receive a lot of light.

plantas means 'plants'

crecer means 'to grow'

rápido means 'quickly'

recibir means 'to receive'

mucha luz means 'a lot of light'

Los vecinos no se quejan, ya que la fiesta es tranquila.
The neighbors don't complain since the party is quiet.

vecinos means 'neighbors'

quejarse means 'to complain'

tranquila means 'quiet'

El tren llega a tiempo, ya que no hay retrasos.
The train arrives on time since there are no delays.

tren means 'train'

llegar means 'to arrive'

retrasos means 'delays'

El niño no va a la escuela, puesto que está enfermo.
The child doesn't go to school since he is sick.

niño means 'child'

puesto que means 'since'

enfermo means 'sick'

La empresa contrata más personal, puesto que necesita cubrir más puestos.
The company hires more staff since it needs to fill more positions.

empresa means 'company'

contratar means 'to hire'

personal means 'staff'

necesitar means 'to need'

cubrir means 'to fill'

puestos means 'positions'

El libro es popular, puesto que la historia es interesante.
The book is popular since the story is interesting.

popular means 'popular'

historia means 'story'

La reunión se cancela, puesto que no hay suficientes asistentes.
The meeting is canceled since there are not enough attendees.

cancelarse means 'to be canceled'

suficientes means 'enough'

asistentes means 'attendees'

El parque está cerrado, puesto que están haciendo mantenimiento.
The park is closed since they are doing maintenance.

cerrado means 'closed'

haciendo means 'doing'

mantenimiento means 'maintenance'

Como es fin de semana, la tienda está llena.
Since it is the weekend, the store is full.

como means 'since'

llena means 'full'

Como hay tráfico, salimos temprano.
Since there is traffic, we leave early.

tráfico means 'traffic'

Como es su cumpleaños, le compramos un regalo.
Since it is his birthday, we buy him a gift.

cumpleaños means 'birthday'

le means 'to him'

Como está soleado, vamos a la playa.
Since it is sunny, we go to the beach.

soleado means 'sunny'

playa means 'beach'

Como el examen es difícil, todos estudian mucho.
Since the exam is difficult, everyone studies a lot.

todos means 'everyone'

Como la clase es interesante, los estudiantes prestan atención.
Since the class is interesting, the students pay attention.

clase means 'class'

prestar atención means 'to pay attention'

Como no hay electricidad, usamos velas.
Since there is no electricity, we use candles.

electricidad means 'electricity'

velas means 'candles'

Como el concierto es gratis, mucha gente asiste.
Since the concert is free, many people attend.

gratis means 'free'

mucha gente means 'many people'

Como hay descuento, compro dos entradas.
Since there is a discount, I buy two tickets.

descuento means 'discount'

Como es temporada de frutas, el mercado está lleno.
Since it is fruit season, the market is full.

temporada means 'season'

frutas means 'fruits'

mercado means 'market'

lleno means 'full'