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"Where" is an adverb which is often translated as "dónde", and "in which" is a phrase which is often translated as "en el cual". Learn more about the difference between "where" and "in which" below.
where(
wehr
)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
adverb
a. dónde
Where do you live?¿Dónde vives?
b. adónde
Where is this train headed?¿Adónde va este tren?
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
conjunction
a. donde
This is the village where I spent my vacation.Este es el pueblo donde pasé las vacaciones.
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in which(
ihn
 
wihch
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. en el cual (masculine)
We need to create a school environment in which all children can thrive.Necesitamos crear un ambiente escolar en el cual todos los niños puedan desarrollarse bien.
b. en la cual (feminine)
They just published a new guide in which they explain how to apply to the university.Publicaron una nueva guía en la cual explican cómo solicitar plaza en la universidad.
c. en el que (masculine)
This is the chapter in which all the questions raised in the book will be answered.Este es el capítulo en el que serán respondidos todos los interrogantes surgidos en el libro.
d. en la que (feminine)
That is the house in which we used to live when I was little.Esa es la casa en la que vivíamos cuando yo era pequeña.
a. en cuál
In which of the dresser drawers did you put the money?¿En cuál de los cajones del tocador pusiste el dinero?
b. en qué
In which year where you born?¿En qué año naciste?
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