is a student
He is not a student.
Tom es un estudiante de instituto.
Tom is a high school student.
He is a promising student.
He is a diligent student.
Él no es un estudiante ordinario.
He is not an ordinary student.
Chen no es un estudiante universitario.
Chen is not a university student.
Tom es un estudiante brillante.
Tom is a brilliant student.
Tom es un estudiante nuevo.
Tom is a new student.
Él es un estudiante de secundaria.
He is a high school student.
Por lo que sé, es un estudiante aplicado.
As far as I know, he is a diligent student.