Aceptar
The Indicative Present of aceptar is used to talk about situations, events or thoughts that are happening now or in the near future. It is also used to talk about facts and truths. For example, "acepto", meaning "I accept".
Aceptar
The Indicative Imperfect of aceptar is used to describe regular and repeated actions that happened in the past and descriptions of things you used to do. For example, "aceptaba", meaning "I used to accept".