Its when you dont add commas , periods etc..
example --- the kid went out and play with his friends and he also forgot to come home on time he got in trouble and he cant do anything.
there is many commas missing that is a run on.
Beowulf uses no weapons to kill Grendel.
I think it’s “Please, sit down, before the teacher arrives.”
Walden is Thoreau's account of two years he spent living in a small cabin he built next to Walden Pond in Concord, Massachusetts.
This statement best describe and summarize the third paragraph of economy in walden
hope it helps
