There is a lot of confusion about these two words because they are similar in meaning. Here are some important differences between them:
LIKE is used:
- to say what something or someone looks/is like.
Peter’s girl-friend looks like Annie Lennox.
Your doorbell sounds like a siren.
The soup smells like fish.
- with noun / pronoun / gerund.
I look like my mum.
The balloon ride was like flying.
AS is used:
- to describe someone’s job / role:
He had worked as a waiter before college.
As your teacher, I am proud of you.
- in expressions: as…as, such as…, the same as…
Jane ran as fast as she could.
Brian visited many Mediterranean countries such as Italy, France, and Greece.