Drag one's feet and Fall behind

Drag one's feet verb - Postpone doing what one should be doing.

Fall behind and drag one's feet are semantically related In some cases you can use "Fall behind" instead a verb phrase "Drag one's feet".

Fall behind verb - Hang (back) or fall (behind) in movement, progress, development, etc..

Drag one's feet and fall behind are semantically related in straggle topic. Sometimes you can use "Drag one's feet" instead a verb "Fall behind".