Form and rules
How it works
Use comparative + than for differences and as + adjective/adverb + as for equality.
Use not as/so ... as for inequality: This route isn't as fast as the highway.
Use much/a lot/far to strengthen comparatives and a bit/a little/slightly to soften them.
Use one of the + superlative + plural noun: one of the best restaurants.
Present perfect commonly follows superlatives about life experience: the best film I've ever seen.