Comparative and Superlative adjective

The text comes from the link of Mr.Woo's blog. We use comparative adjectives to describe and compare two things. We add "er" after the one or two sounds's adjectives. "Jiro is taller than Yukio." this sentence is comparing their height.

This text comes from the science textbook. We use superlative adjectives to describe and compare a thing with two or more things. We add "est" after the adjectives and add article "the" to the beginning of the adjectives. "The tallest living thing on the earth is the giant redwood in California." this sentence is comparing the giant redwood with the living thing on the earth.