when   
fony
when. It is always used of a past time: Fony fahavelony, when he lived [Richardson 1885]
when (in the past); fony zaza aho: when I was a child [Hallanger 1973]
nony
when, if, if otherwise. [Richardson 1885]
when (used of simultaneous events) [Hallanger 1973]
oviana
when? (of past time) [Hallanger 1973]
raha
when, if, as for, since. [Richardson 1885]
when, when and if, if [Hallanger 1973]
rahatrizay
when someday in the future, at a time when [Hallanger 1973]
rahoviana
when ? (of future time) [Hallanger 1973]
rehefa
when (of future time) [Hallanger 1973]