How To Use " In Which" - English, baby!
www.englishbaby.com › lessons › 2824Sep 22, 2007 · “In which” is a combination of a preposition (in) and a relative pronoun (which). You can use “in which” as a precise way to introduce a relative clause after a noun that refers to a place or to a time. For example instead of saying In my laboratory there is a blue cabinet where old equipment is stored. You can say