Future subjunctive curiosity

Question

I know this tense isn't really used anymore, but out of curiousity, how would it be conjugated and used? Do people still use it in some places? When did people stop using it? It seems kind of redundant as the future is already used to talk about things that haven't happened yet, which is a use for the subjunctive, right?

Answer 1

For further info also read this thread.

Answer 2

how would it be conjugated

future subjunctive

used to talk about things that haven't happened yet, which is a use for the subjunctive, right?

You need to provide an example. Are you referring to using the subjunctive after adverbs or phrases that refer to the future.....cuando ella llegue. (she hasn't arrive yet)?