Present Perfect Simple czy Continuous ?

Cześć!
Mam pytanie:
Jak powiedzieć: NIgdy tego nie robiłem. ( bez skojarzeń :p )

I've never done it or I've never been doing it.

jakies małe wyjaśnienie
z góry thx ;]

If you refer to your experiences, you use PRESENT PERFECT SIMPLE:
'I have never done it (before).' - it means you neither did it in the past nor in the present

If you refer to your experiences from a point of the past time, you use PAST PERFECT SIMPLE:
'I had never done it (before).' - which means you didn't do it in the past up to another specified time in the past

Just remember - talking about one's experiences introduces Perfect Simple tenses.

I've never done it.
najprostrze wyjasnienie jaki mi przychodzi do glowy: trudno podkreslac ciągłość (continuity) czynnosci, ktora nigdy nie miala miejsca

STSZE