Номер 4:
sweet- swetter- the sweetest
bad-worse-worst
big- bigger- the biggers
beautyful- more beatyful- the most beautyful
good-better- the best
hot- hotter- the hottest
номер 3:
1. 1-ый
2. 3-ий
3. 7-ой
4. 5-ый
5. 11-ай
6. 18-ый
7. 76-ой
8. nineteenth
9. twenty
10.thirteenth
11. second
12. fourth
13.fifteenth
14. sixteenth