Можете, , подробно обьяснить это правило?

1. the girl was alone, rather a short young woman of twenty-two. 2. her companion, a handsome dark-haired young man, had left. 3. she was seventeen then – a beautiful young girl. 4. this is my friend, a fashion designer. 5. tokyo, the capital of japan, is one of the  largest cities in the world. 6. our university, a grey four-storeyed building, is situated in the centre of the city. 7. mrs bennet, a woman of fifty, resembled my mother. 8. i saw him speaking to frank cooper, a englishman. 8. meet gerry langton, a cousin of mine. 9. this is bingo, our dog. 10. beside him there was a portrait of his wife, .a thin woman in black.1. she nodded to me with a smile. 2. i’ll do it with pleasure. 3. everybody looked at her in surprise. 4. he worked from morning till night but earned very little. 5. they were talking in low voices. 6. i was trembling like a leaf. 7. the boys were dirty from head to foot . 8. jack called her in a loud voice. 9. may listened to him with disappointment. 10. she went up the steps like a bird. 11. the detective went from house to house asking questions. 12. she was weeping like a child. 13. the young man smiled in amazement. 14. the two of them were walking side by side. 15. the driver was a young fellow with large red hands, a long nose and orange hair. 16. they work with enthusiasm. 17. it was a little house with green windows and a brown door.

1. Yes, she is the most interesting person I have ever met. 
2. Yes, its the longest book I have ever read. 
3. Yes, its the best opera I have ever heard.
4. Yes its the most difficult article I have translated.
5. Yes, its the funniest film I have ever seen. 
6. Yes, Uncle Jack its the kindest man I have ever known.
7. Yes, its the most exciting trip I have ever had.
8. Yes, its the most expensivest record I have ever bought.
9. Yes, Mary is the tallest girl I have ever met.
10. Yes, its the hardest test I have ever done.