keep
Training can be a gerund or a present participle.'Training for the marathon has kept me busy for months.' (Gerund)'He is training in the gym this evening.' (Participle)
Being is the present participle. The past participle is been.
Getting is the present participle of get.
The present participle is doing.
The past participle of keep is kept
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."