Quick answer
"When" is an adverb which is often translated as "cuándo", and "if" is a conjunction which is often translated as "si". Learn more about the difference between "when" and "if" below.
when(
wehn
)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g. to run quickly, very tired).
1. (in questions)
a. cuándo
When was the last time you cried?¿Cuándo fue la última vez que lloraste?
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g. The cat and the dog slept.).
2. (relative)
a. cuando
I was sleeping when he got home.Estaba durmiendo cuando llegó a casa.
b. en que
That was the year when we bought our first apartment.Ese fue el año en que compramos nuestro primer apartamento.
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if(
ihf
)
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g. The cat and the dog slept.).
1. (conditional)
a. si
If I were a rich woman, I would travel the world.Si yo fuera rica, viajaría por el mundo.
2. (whether)
a. si
I do not know if they will like my cooking.No sé si les gustará mi comida.
3. (adversative)
a. aunque
It is a wonderful car, if rather expensive.Es un carro fabuloso, aunque bastante caro.
b. si bien
She's a good girl, if a little naive.Es una buna chica, si bien un poco inocente.
A noun is a word referring to a person, animal, place, thing, feeling or idea (e.g. man, dog, house).
4. (assumption)
a.
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
no direct translation
If he enters the race—and that's a big if—he could receive many votes.Si entra a la carrera—y está por verse—podría recibir muchos votos.
The success of this project depends on a lot of ifs.El éxito de este proyecto depende de muchas suposiciones.
ifs
A plural noun indicates that there is more than one person, place, thing, or idea.
plural noun
5. (conditions)
a.
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
no direct translation
Do your homework now, or you can't go to the movies. No ifs or buts!Haz la tarea ahora, o no puedes ir al cine. ¡Nada de peros!
Don't worry about the ifs, just enjoy the moment.Olvídate de las dudas y disfruta el momento.
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