Yes but whatever page you’re reading, we don’t have it
A run-on sentence usually occurs when two separate sentences or clauses are improperly combined. However, unlike sentence fragments, run-on sentences can still be technically grammatically correct. So technically the are bad.
Just keep at it! The only way to learn a new language is to keep studying and working at it. I wish you the best of luck!
Infinitive: “to run”
An infinitive is the word “to” followed by a verb