Typically, finding a run on sentence can be easy. "I like to write papers I could write all day everyday" do u see how it's dragged out? Adding stuff that doesn't seem necessary or just overall could be rewritten as a new sentence.
When the person writing the sentence doesn't use any sort of punctuation in the sentence at all.
Explanation:
Run-on sentences, also known as fused sentences, occur when two complete sentences are squashed together without using a coordinating conjunction or proper punctuation, such as a period or a semicolon. Run-on sentences can be short or long. A long sentence isn't necessarily a run-on sentence.
