Present Perfect (have/has + V3)

Связь прошлого с настоящим: опыт, результат, незаконченный период.

Форма

have/has + третья форма глагола: I have finished, she has seen. Вопросы: Have you been there?

I've visited Paris (в жизни вообще). С ever/never: Have you ever tried sushi?

I've lost my keys (сейчас их нет). just, already, yet, recently часто с Present Perfect.

PP без точного времени; Past Simple с yesterday, in 2010: I saw him yesterday vs I've seen him before.