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 difficult than English?

If we talk about the two planets Earth and Mars, we can compare them as shown in the table opposite:

See also Superlative Adjectives