Look after — take care of.

Look for — search for something.

Look forward to — wait for something.

Look back — remember something from the past.

Look out — be careful.

Look up — search the word in the dictionary. up for after forward to out back on off

1. I don't know the meaning of this word. I need to look it in the dictionary.
2. I have lost my keys. I'm looking them everywhere.
3. Can you, please, look my cat while I'm on holiday?
4. I'm really looking hearing from you soon.
5. Look ! There is an aggressive dog over there.
6. I need to look at the situation which happened last week.