Il present perfect collega il passato al momento presente. Somiglia al nostro passato prossimo: have / has + participio (has con he, she, it).

• I have visited London. — I've visited London.
• She has lost her keys. — She's lost her keys.

Nei verbi regolari il participio è uguale al passato: worked, visited, finished, travelled. Negli irregolari a volte c'è una terza forma:

Verbo	Passato	Participio
be	was / were	been
go	went	gone
do	did	done
see	saw	seen
eat	ate	eaten
drink	drank	drunk
find	found	found
have	had	had
buy	bought	bought
lose	lost	lost

Sempre have, mai be — anche con go: She has gone, non ~~she is gone~~. Domande e negazioni si fanno con have stesso, senza did: Have you eaten? — Yes, I have. / No, I haven't. Attenzione: she's può essere she is o she has — she's lost = she has lost.