Nunca he visitado el museo (I have never visited the museum). Recientemente, he estado enfermo (I have been ill recently).

Nunca he visitado el museo (I have never visited the museum). Recientemente, he estado enfermo (I have been ill recently).

To establish the difference between the use of ‘has/have’ and that of ‘had’, one needs to understand the essence of the past perfect tense. When two things occurred in the past ...