Depends on what pencil case
A pencil case is called 'une trousse'; "In my pencil case I have a pencil" is "dans ma trousse il y a un crayon."
If you are referring to the phrase "To serve a purpose" then it would mean to give a use for. For example, A pencil holder cup serves a purpose to a pencil... the pencil give the holder purpose and that purpose is to hold the pencil. Basically it means, that something has a use... there is a reason/intended use for this thing.
The purpose of the pencil invention is to write down letters to form words.
The volume of a pencil case is about 1 millimeter cubed.
A pencil case is generally a zippered pouch.
in my pencil case, I don't have ... -> dans ma trousse, il n'y a pas ... it translates back to: in my pencil case, there is no ...
the spelling for pencil case in french is "une trousse".
i hope this helps, pencil case in spanish is un estuche . :)
to write with.
A pencil case is 'une trousse', then the plural is 'des trousses'.
The first pencil case was invented in 1880 and Ebenezer Wood invented it.