Look ahead – планировать
In this business, it's very difficult to look ahead and predict what will happen.

Look at - взглянуть на...
Could you look at my report and tell me if you think it's OK?

Look back - оглядываться назад
I realise I was very naive when I look back.

Look down on – пренебрегать
The people who work in Headquarters always look down on the people in the branches.

Look for – искать
He has been looking for a job for ages now.

Look forward to (doing!) smth - с нетерпением ждать
I'm seeing him on Tuesday. I'm really looking forward to it.

Look in - заскочить, забежать
Look in on Jenny and check that she is still working.

Look into – рассмотреть
We have set up a working group to look into the problem.

Look up - посмотреть в книге
Hold on a sec, I’ll look this word up in the dictionary