Question

O correto seria Rodrigo were watching tv

Answer 1

Não. O correto é Rodrigo WAS watching TV. Were e Was tem o mesmo significado, assim como ambos representam o passado, mas um é usado em primeira pessoa do singular ou terceira no singular (Was) e a outra normalmente usado na primeira pessoa do plural ou terceira pessoa do plural (Were).

Exemplo:
They WERE watching TV
The boys WERE watching TV
The girls WERE watching TV
We WERE watching TV


I WAS watching TV
She WAS watching TV
My father was watching TV
He WAS watching TV