Then, As...As

We use than when comparing nouns using comparative adjectives.

Examples:

  • He is much more successful than I am.
  • Mike isn't faster than Brian.
  • These rings are more expensive than the ones we saw yesterday.

Instead of using I am you can simply use me.

  • He is taller than me.

We use as...as when comparing nouns using an adjective.

  • He is as old as my brother.
  • She wasn't as happy as the other kids.
  • I'm not as impatient as my girlfriend.