What is the difference between a relative adverb and a relative pronoun?
|who||subject or object pronoun for people||I told you about the woman who lives next door.|
|which||subject or object pronoun for animals and things||Do you see the cat which is lying on the roof?|
|which||referring to a whole sentence||He couldn’t read which surprised me.|
|whose||possession for people animals and things||Do you know the boy whose mother is a nurse?|
|whom||object pronoun for people, especially in non-defining relative clauses (in defining relative clauses we colloquially prefer who)||I was invited by the professor whom I met at the conference.|
|that||subject or object pronoun for people, animals and things in defining relative clauses (who or which are also possible)||I don’t like the table that stands in the kitchen.|
A relative adverb can be used instead of a relative pronoun plus preposition. This often makes the sentence easier to understand.
This is the shop in which I bought my bike.
→ This is the shop where I bought my bike.
|when||in/on which||refers to a time expression||the day when we met him|
|where||in/at which||refers to a place||the place where we met him|
|why||for which||refers to a reason||the reason why we met him|