
David G. answered 03/24/19
OChem, Calc, ACT/SAT/GRE-years of exp. w/all ages, former OChem TA@UCB
In this case, I would relegate the concept communicated in the perfect aspect in English to a completely different phrasing: "È un'anno che cammino nel parco." That's a general rule for the present perfect: you'll just have to find a different way to say it, and the construction above is very useful for that purpose.