Study the phrasal verbs. Lead-in.

Jack has no respect for Jane, he looks down on her.

Jane admires Jack, she looks up to him. He’s an example to follow for her.

Peter is looking for something.

Look out, Pete! You can bang your head against the top of the table,” his mother said.

“If you need extra information for your report, you can look it up on the Internet or in an encyclopaedia. You can also look through the books that we have on the bookshelves,” the librarian said.

More phrasal verbs with LOOK …

look after  take care of somebody/ something:
Our nanny will look after the kids while we are away.
look down on  show disrespect to somebody:
Mr. Beads often looks down on his employees, commenting on their work condescendingly*.
look for  search, try to find something:
I have looked for my car keys everywhere, but I still can’t find them.
look forward to  expect something nice and pleasant to take place/ happen:
We look forward to seeing you soon again!
look intoinvestigate, examine:
The police are going to look into the matter as soon as possible.
look on  watch something taking place without getting involved into it yourself:
Matt kept looking on as the others tried to help the casualties.
be looked on as  be considered:
Lilly is looked on as an expert in linguistics.
look out  used to warn about a danger:
Look out! You are going to hit your head.
look overcheck or examine quickly:
Let’s look over that stack of books to decide which ones we need for our thesis.
Many students do what we call “cramming” – … maybe spend a day or two before the exam looking over their notes and trying to cram them into their memory … (Ya. Weinstein, Understanding how we learn. A visual guide)
look roundwalk around a place to see what is there:
We looked round the house intending to buy it but were not satisfied with its condition.
look through  read something quickly:
He looked through his notes and started writing the test.
pretend not to notice somebody:
She looked straight through him, thus inflicting him severe pain.
look upsearch information or a word in a dictionary or online:
If you have unfamiliar words in the article, look them up in the dictionary.
look up to  respect somebody:
Children always look up to their parents and grandparents.

Practice