Phrasal Verb: Keep up
Meaning: Not let someone go to bed
Example: My neighbours KEPT me UP till after 4 am with their loud music last night.
Meaning: Maintain a continuous action, persist
Example: First I phoned you and left a message that you should phone me; then you phoned and I was out, so you left a message; then...! How long can we KEEP this UP without ever speaking to each other directly?
Other Phrasal Verbs
We have 15 phrasal verbs with 'KEEP'