Pensar (subjuntivo)
I understand that a common trigger for the use of the Subjunctive in Spanish, is the prescence of 2 different subjects in a sentence.
Does this exclude certain verbs? For example, the use of Creer or Pensar?
Por ejemplo:
Pienso que debas comprarla o Pienso que debes comprarla.
I think you should buy it (but I don't know if you will, therefore I use the Subjuctive mood).
Is it wrong to assume that if there are 2 different subjects, then the Subjunctive applies to ANY verb?
pd. Perdóneme por escribir en inglés, pero es más facil para explicarme.