Are these all correct expressions? If so, would you please tell me the difference in meaning between 'keep -ing' and 'go -ing'? And tell me if # 1 & 2 mean intentional actions or not, please.
1. My boy keeps/goes coughing.
2. I keep/go coughing.
3. He kept/went talking.
4. I kept/went talking.
Enjoy twinkling stars in the dark sky.