check *****
check up on
look into **
check out **
suss out
check over
go over **
check into

I really should get back - if only to check over the books.

He spent the last two hours checking over those men.

"I'll check them over later this afternoon and let you know if there's any I want to see."

The next is that quality increases when people check over each others work.

Before making the big transition, however, do check over the plants.

One of these days he'd better get a builder to check over it.

I thought you might like to check over my work.

He checked over his shoulder to see if the man was looking.

He checked over his shoulder to make sure no one was looking.

She checked over her shoulder and took a long look down the dark street.