Look - Specific - Você olha para focalizar e se concentrar em algo.
Watch - In progress - Você assiste algo em ação ou movimento.

Can you see the bird?
What birds can you see?
He saw the birds in the sky.

I'm looking for someone to help me in the museum over the weekend.
I love this painting, I can look at it all day.

Are they watching the Soap Opera tonight?
They watched the Soap Opera tonight.
