riding is the present participle.
I am riding is present progressive
Riding is the present participle.
Ridden is the past participle of ride.
The present progressive is formed with am/is/are + present participle.The present participle of ride is riding. Some examples:I am riding the horse.She is riding the horseThe boy is riding the horseThey are riding horsesThe boys are riding horses.
Getting is the present participle of get.
The present participle is doing.
Being is the present participle. The past participle is been.
Presenting is the present participle of present.
Presenting is the present participle of present.
The present participle is choosing.
The present participle is walking.
The present participle is cleaning.
The present participle is seeking.