Suppose a girl left my room and while leaving, she was smiling. Then which of the following should I use?
1. She left my room smiling.
2. She left my room, smiling.
Should I use comma ? Actually adding a comma makes me think that first the girl smiled and then left my room and the time difference between two actions is very less and that's why I use present participle form rather than perfect participle. Please clear my confusion.