No sé cómo se abre esta caja.
No sé cómo se abre esta caja.
No sé cómo abrir esta caja.
Are they both correct?
2 Answers
I think both of the sentences are right
Yes they appear to be correct They do say essentially the same thing in slightly different ways.
The first; I do not know how this box opens.
The second; I do not know how to open this box.