You Laughing, Or if you say it someone else, them laughing, or if you say "Ha, Your laughing in a teasing way then it would be making fun of there laugh
The present progressive is used for an event that continues to occur at the present moment in time.
Answer:
i met an old friend unexpectedly when i was walking alone the street at that time.
Explanation:
u can combine them and use a conjunction
hope this helps
correct me if this is wrong
