Phrasal Verbs Using 'On' & 'Upon' - Starting, Continuing, or Getting Closer (On)
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to cause something to happen, especially something undesirable or unpleasant
to continue with a task or activity, especially with determination or enthusiasm
to continue for an extended or tedious period, often with no clear resolution or conclusion
to gradually invade a particular area, exceeding established boundaries
to get closer to a person or thing that is being pursued, often in a race, competition, or chase
to continue without a pause, often lasting longer than expected or needed
to continue moving forward despite obstacles, challenges, or difficulties
to cause a machine, device, or system to start working or flowing, usually by pressing a button or turning a switch
(of a situation or issue) to continue for a long period of time without resolution