Doubt in verb. Please help.

Hello. Could you please help me which one is correct?

A

1) You might go your whole life without ever experience anything mind-blowing, but ...

2) You might go your whole life without ever experiencing anything mind-blowing, but ...

and

B

1) The "ego" is a trickster. If having ecstatic moments keeps it alive and well, then ....

2) The "ego" is a trickster. If having ecstatic moments keep it alive and well, then ....

Thank you very much.