Keep around
Keep something near you
Keep at
Continue with something difficult
Keep away
Don't allow someone near something
Keep back
Maintain a safe distance
Keep down
Not vomit
Keep from
Control yourself, refrain
Keep in
Not allow someone out
Keep in with
Maintain good relations, stay on good terms with someone
Keep off
Not talk about
Keep on
Continue doing something
Keep out
Not allow someone to enter
Keep to
Stay within limits
Keep up
Not let someone go to bed
Keep up at
Continue, not quit
Keep up with
Move at the same rate