1. I've finished my painting. Have a look at it!
2. My Mom has called me three times this morning.
3. I haven't done this exercise yet.
4. Have you ever been to Nigeria?
5. I've known him since 2002.
6. She's just laid the table.
7. The weather has been nasty since morning.
8. How long have you been in the room?
9. Where have you been?
10. I've wanted to go to Disneyland since childhood.
Слова маркеры: since, just, already, ever, this morning, yet.
Present Perfect - указывает на наличие результата прошлого действия к настоящему моменту.
Первый пример (разбора):
1. I've finished my painting. Have a look at it! - Я закончила (рисовать) свою картину. Иди взгляни! (Результат я закончила свою картину, не важно когда картина нарисована, результат вот сейчас картина перед глазами, иди взгляни!