Are these two subjects

Question

in the sentence; Nosotros nos habíamos sentado cuando el tren salió, are "nosotros" y "nos" both subjects?

Answer 1

Hi, and Welcome to the Forum!

The subject of this sentence is Nosotros.

Nos (opurselves) is the reflexive pronoun. Sentarse is a reflexive verb, so the sentence reads, literally,

We had sat ourselves (down) when the train left.

By the way, it's a bit of an odd sentence. The translation in English would be

We had sat down when the train left.

Gramatically, though, it's correct.

Answer 2

reflexive use

A verb is reflexive when the subject and the object are the same.

subect=nosotros (We)

object=nos (ourselves)

Both the subject of the verb and the object of the verb refer to the same persons.