Verb keep up has 5 senses
  1. keep up - maintain a required pace or level; "He could not keep up and dropped out of the race"
    Sample sentence:
    Somebody ----s
  2. prolong, sustain, keep up - lengthen or extend in duration or space; "We sustained the diplomatic negociations as long as possible"; "prolong the treatment of the patient"; "keep up the good work"
    --2 is one way to continue, uphold, carry on, bear on, preserve
    Sample sentences:
    Somebody ----s something
    Something ----s something
  3. conserve, preserve, maintain, keep up - keep in safety and protect from harm, decay, loss, or destruction; "We preserve these archeological findings"; "The old lady could not keep up the building"; "children must be taught to conserve our national heritage"; "The museum curator conserved the ancient manuscripts"
    --3 is one way to keep
    Sample sentence:
    Somebody ----s something
  4. keep up, keep abreast, follow - keep informed; "He kept up on his country's foreign policies"
    Sample sentences:
    Somebody ----s
    Somebody ----s PP
  5. keep up - prevent from going to bed at night; "The anticipation of the trip kept the children up all night"; "I kept myself up all night studying for the exam"
    Sample sentences:
    Somebody ----s somebody
    Something ----s somebody
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