Not at any time; on no occasion.

कभी नहीं

English Usage: I have never seen that movie.

Hindi Usage: मैंने उस फिल्म को कभी नहीं देखा।

A time that will never occur.

ऐसा समय जो कभी नहीं आएगा

English Usage: The never of our childhood seems so distant now.

Hindi Usage: हमारी बचपन की कभी नहीं इतना दूर लगता है।

To not do something at any time.

किसी चीज़ को कभी नहीं करना

English Usage: She will never forget this day.

Hindi Usage: वह इस दिन को कभी नहीं भूलेगी।