Look for = Try to find a thing or person
- I can’t find my keys! Can you help me look for them?
- He doesn’t like his current job, so he’s looking for a new one.
- I looked for you at the party last night, but I didn’t see you.
Look up = Try to find information
- If you don’t know a word, you can look it up in the dictionary.
- I’ll look up the store’s address on the internet.
- I didn’t know the answer, so I looked it up in the book.
Look after = Take care of somebody or something
- A babysitter is a person who looks after children.
- Could you look after my dog this weekend?
- We need somebody to look after our house while we’re traveling next year.
Look forward to = Be happy about something that will happen in the future
- We’re really looking forward to the show – it will be great!
- John hasn’t taken care of his teeth, so he isn’t looking forward to his dentist appointment.
- I look forward to hearing from you. (<– this is a common phrase to finish a letter or e-mail)