We can also use the present perfect to talk about experiences we’ve never had with negative words like nunca ("never") and jamás ("ever"):
Nunca he comido ostiones.
I’ve never eaten oysters.
Jamás he ido a Bolivia.
I’ve never been to Bolivia.
Conversely, you can use the frequency adverb siempre ("always") to express something that started in the past and continues into the present:
Siempre he pensado que la educación es lo más importante.
I’ve always thought that education is the most important thing.