Understanding what you want
Answer:
The item that does not belong is:
b. olvidar
Explanation:
The set is linked with pain.
Answer:
You use preterite form when talking about past actions
ex: Ella caminó por el parque
You mainly use the imperfect tense when talking about repeated, usual, or habitual actions in the past
ex: Los sábados yo jugaba con mi vecino
