look after - "Can you look after the children while I go to the supermarket?"
to take care of someone or something
look for - "If your job is so boring then look for a new one."
to try to find something
look forward - "I'm looking forward to the party on Saturday. It's going to be fantastic."
to feel happy because you're going to do something
look around - "Let's look around the museum before lunch."
to see what there is in a place
look up - "If you can't remember what a word means, look it up in a dictionary."
to find a piece of information in a book/website
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