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"In which" is a phrase which is often translated as "en el cual", and "when" is an adverb which is often translated as "cuándo". Learn more about the difference between "in which" and "when" below.
in which(
ihn
wihch
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (relative)
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.
when(
wehn
)An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
2. (relative)