She is the prettiest girl in the village. (Make it comparative)

♦ Superlative Degree থেকে Comparative Degree তে রূপান্তর করার নিয়ম:
(i) Superlative Subject + Verb
(ii) The উঠে যাবে
(iii) Superlative এর Comparative form + than any other
(iv) বাকি অংশ

Example: 
Superlative: She is the prettiest girl in the village. 
Comparative: She is prettier than any other girl in the village.

Superlative: He is the oldest man in the village.
Comparative: He is older than any other man in the village.

আবার,
- Superlative -> Comparative
1. of all          -> than all other
2. One of the    -> than most other.