What it means
一度も means “not even once” or “never.” It emphasizes that an action or event has occurred zero times. It normally appears before a negative predicate and can describe past experience, repeated behavior, or something that will not happen.
Usage note
一度も must normally be used with a negative predicate, such as 一度も行かない or 一度も行きません. Do not confuse it with 一度は, which means “at least once” or “at one point,” often with a contrasting nuance.
How to use it
一度もVerb (ます-stem)ません
私は一度も嘘をつきません。
I never tell a lie.
一度もVerb (ない-form)
私は一度も嘘をつかない。
I never tell a lie.