Nature is the ________ physician.

সাধারণত Superlative degree এর পূর্বে the এবং পরে of/in বসে। পরে স্থান থাকলে in বসে। structure টি হচ্ছে:
the + Superlative degree + noun + of (+plural noun)/in (+singular Noun).
যেমন- His wife is the worst cook in the world.
The bus is the least expensive way to get around.
He is the tallest in the class.