The present participle of "decide" is "deciding".
I/You/We/They decide. He/She/It decides. The present participle is deciding.
Taken is the past participle; taking is the present participle.
Had decided is the past participle.
Being is the present participle. The past participle is been.
Getting is the present participle of get.
The present participle is doing.
Had decided is the past participle.
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.