lock yourself away +
I lock myself away for a few weeks before exams.
I had forgotten my password and couldn't log in.
log into +
I logged into the staff intranet to check my email.
log off +
When she'd finished working on the spreadsheet, she logged off and left the office.
log on +
He entered his password for the college intranet and logged on.
Danny closed the programs and logged out when it was time to go home.
look after +
When my sister goes on vacation, I look after her dog.
When we look back, we can now understand what caused the difficulty.
look back on +
When I look back on my childhood, I often feel angry.
look down on +
She's so conceited. She looks down on everybody else.
look for +
I'm looking for my keys. Have you seen them?
look forward to +
I am looking forward to traveling to New York next year.
I'll look in on my way home.
look in on +
I'm going to look in on grannie on the way home tonight as she's been a bit unwell recently.
look into +
The police are looking into the murder.