Prepositions (voorzetsels)
A preposition is a word that indicates the relationship between a noun (zelfstandignaamwoord) and the other words of a sentence.
---> The cat is in the box.
We have :
Prepositions of place and direction, (to, from, across, between)
Prepositions of time (on, at, for, since)
Prepositions of agents of things (of, about, with)
Whom is often used in combination with for and to