Use of Comparative Adjectives
We use comparative adjectives when talking about 2 things (not 3 or 10 or 1,000,000 things, only 2 things).
Often, the comparative adjective is followed by "than".
Look at these examples:
John is 1m80. He is tall. But Chris is 1m85. He is taller than John.
America is big. But Russia is bigger.
I want to have a more powerful computer.
Is French more