No, l have never flown by plain in my life.
2. Yes, l had given my favourite book to my friend, it was on Monday last week.
3.Yes, l have done tee in the morning today.
4. No, l have never found anything on the street in my life.
5. Yes, l have understood the present tense when l had done the exercises in my exercise book.
6. Yes, l have fallen dawn, but l can't tell exactly when it happened.
Объяснение: