were studying, studied
Pero creía que los dos estudiaban juntos en las clases del MBA.
But I thought they were both studying together in the MBA classes.
— Kal Ho Naa Ho (2003)
Los alumnos estudiaban en grupos de dos.
The students studied in groups of two.
They were studying.
Los alumnos estudiaban en parejas.
The students studied in pairs.
Los dos estudiaban Derecho juntos.
The two were studying Law together.
— Locamente millonarios (2018)