when do you use at, in and on? F.e.: my niece studies in a secondary school or my niece studies at a secondary school?. Thank you everyone.
at, in and on
I would say 'I study AT [Place the school/college/University name]' For example: I study at Barcelona University (Because it is a concrete location) Instead, if you are in Barcelona you would say that: I study IN Barcelona (Because it is a big location).
AT: Time & Hours (At 8.30)
IN: Inside (The ball is in the box)
ON: Touching the surface (The ball is on the table)
Hope this helps