Diamond is harder than any other substance. (Change into positive degree)

Correct answer: No other substance is as hard as diamond.

• Than any other/ all other যুক্ত Comparative degree কে Positive degree তে রূপান্তরের নিয়ম:
- Positive degree- এ sentence এর শুরুতে No other বসে।
- any other বা all other এর পরের অংশ বসে।
- Verb বসে।
- as + Comparative degree এর positive form বসে + as বসে।
- Comparative degree এর subject বসে।

• Structure: No other + any other / all other এর পরের অংশ + verb + as +Comparative degree এর positive form + as + প্রদত্ত sentence এর subject.

Comparative: Diamond is harder than any other substance.
Positive: No other substance is as hard as diamond.

Source:
1. Advanced Learner's Communicative English Grammar & Composition By Chowdhury & Hossain.
2. Website English Wizard by Saleh Ahmed.