1) The blue scarf is warmer than the green scarf. (warm) - сравнительная степень
2) I think the blue jeans are the best. (good)- превосходная степень
3) Look! The red T-shirt is smaller than the yellow T-shirt. (small)- сравнительная степень
4) Mag's dress is the most beautiful. - превосходная степень
5) This black umbrella is the worst. (bad) - превосходная степень