compañero de clase
Classmate is correct, as it is one word.
You would use the pronoun "tú" when talking to a classmate in Spanish.
compañero: classmate, co-worker.
compañero de clase
Compañero/a del clase.
for denouncing a pro-Spanish classmate
Male classmate and un compañera de clase means female classmate .
Que es una compañera
how do you spell lemon in spanish
It can mean classmate or colleague (for work).
"con" I think "con" is how you spell with in spanish.
flaco is how you spell skinny is spanish.