This is the complete text using the present perfect, past perfect and present perfect subjunctive:
Hasta este año, yo (1) había sido (ser) sedentaria. (2) Había pasado (pasar) mis ratos libres enfrente de la televisión o en un cine. Jamás me (3) habían interesado (interesar) los deportes y como consecuencia (as a result) (4) había aumentado (aumentar) mucho de peso. Pero este año (5) he decidido (decidir) cambiar todo eso. (6) He comenzado (comenzar) a hacer ejercicio en un gimnasio y (7) he aprendido (aprender) a nadar. Mi madre cree que no es verdad que yo (8) haya hecho (hacer) tantos cambios (changes) en mi vida y que yo (9) haya bajado (bajar) de peso. La próxima vez (next time) que me vea, ella se va a dar cuenta (realize) de que yo sí (10) he seguido (seguir) una vida saludable.
The Spanish present perfect tense (''pretérito perfecto compuesto'' in Spanish) is used to talk about things that started in the past and continue or repeat in the present, as well as to talk about things that have happened in the recent past.
The past perfect tense ('Pretérito pluscuamperfecto' in Spanish) is used to talk about a past action that happened before another past action.
The present perfect subjunctive ('pretérito perfecto de subjuntivo' in Spanish) is used to talk about things that happened in the past but are connected to the present and also to talk about what will have happened by a certain point in the future.
Check more information about the present perfect tense here brainly.com/question/11036517
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