The present participle is verb + ing.
knitting
walking
talking
looking
reading
etc
The past participle is knitted.
Being is the present participle. The past participle is been.
Getting is the present participle of get.
The present participle is doing.
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 leading.
The present participle of "understand" is "understanding."
The present participle is swearing.