Deutsch:
dabei sein; dabeisein [alt] | dabei seiend; dabeiseiend | dabei gewesen; dabeigewesen [alt] | er/sie ist dabei | ich/er/sie war dabei | er/sie ist/war dabei gewesen; er/sie ist/war dabeigewesen | Ich bin dabei!
Englisch:
to be there; to be present; to be involved | being there; being present; being involved | been there; been present; been involved | he/she is there; he/she is present; he/she is involved | I/he/she was there; I/he/she was present; I/he/she was involved | he/she has/has been there; he/she has/has been present; he/she has/has been involved | Count me in!