Ответ:
1. I've seen Pete today.
2. I've read this book this week.
3. I've never been to Washington.
4. Have you ever visited to New York?
5. Where have you put my pen? I cannot find it.
6. I haven't seen the eruption of a volcano.
7. We've already read this book.
Объяснение:
Для образования Present Perfect Tense нужно have или has+третья форма глагола (причастие прошедшего времени).