It would be Estudiano, but one very rarely uses the gerund by itself. It is almost preceded by some conjugation of the verb 'Estar'
Estoy estudiando --> I'm studying
Está estudiando --> (s)he's studying.
To study = estudiar studying = estudiando To be studying = estar estudiando
Yeah, so am I.
"Estoy estudiando"
note cards
' Cuales materias estudias' = 'What subjects are you studying' as a question, or '....which subjects you are studying' as a subordinate clause.
estoy estudiando japones :)
Estoy aprendiendo español y estudiar en la universidad
Estoy estudiando español. (I'm studying Spanish). You could also say, "Llevo clase de español".
Estudio la medicina interna.
It means, "I hope you're studying."
You would say "Estoy estudiando enfermería"
Estudiar Estudiando (Sometimes) (and all the conjugations in present indicative)