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.
RELATIVE ADVERB
|
MEANING
|
USE
|
EXAMPLE
|
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
|
(ego4u.com)
