Help :)

Good morning everyone! Is it right to say "I Was cleaning up" or "I was doing the clean up" or both is right?
Thank you

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"I was cleaning up" is more grammatically correct.  

For example, if someone asked what you were you doing earlier today? you would say "I was cleaning up." 

"I was doing the clean up" makes one wonder if you were alone, cleaning up, or were cleaning for a while at an event or something.  In america, saying "I was doing the clean-up" sounds like an ordeal. It makes it sound like you cleaned for a really long time.

You also could say:  "I was cleaning" or "I was cleaning things up"

Good luck. I hope this helped. :)