Boy, the subjunctive is a challenge. I've seen it laid out somewhere in an old-fashioned grammar book years ago. I remember some from my Latin days, too. It would be fun to try to conjugate the different tenses. (Yes, I really DO need to get a life beyond grammar. Ha!)
Here goes my attempt. Feel free to argue with any entry. My memory is shoddy these days, especially in this Texas August heat!
First, to orient myself, I will attempt the indicative tenses:
Present: Today, he goes . . .
Present Progressive: Right now, he is going . . .
Past: Yesterday, he went . . .
Past Progressive: Yesterday, he was going . . .
Pluperfect (?): He had gone . . .
Pluperfect (?) progressive: He had been going . . .
Future: Tomorrow, he will go . . .
Future Progressive: Tomorrow, he will be going . . .
Future Past: Someday, he will have gone . . .
Future Past Progressive: Someday, he will have been going . . .
Subjunctive
Present: I wish he went . . .
Present Progressive: I wish he were going . . .
Past: I wish he had gone . . .
Past Progressive: I wish he had been going
Pluperfect: Well, if the rule is you go back one tense, then how would you go back from here? Is there a subjunctive constructive for this?
Future: I wish he would go to the party next week, but he refuses.
Future progressive: I wish he would be going . . .
Future Past: Someday, but not now, I will wish he had gone . . .
Future Past Progressive: Someday, I will wish he had been going . . .
I wonder what happens if we also conjugate "wish."
Present: I wish he went . . .
Present progressive: I am wishing he were going . . .
Past: I wished he had gone . . .
Past Progressive: I was wishing he had been going . . .
Pluperfect: I had wished he had been going . . .
Pluperfect Progressive: I had been wishing he had been going . . .
Future: I will wish he would go . . .
Future Progressive: I will be wishing he would be going . . .
Future Past: By that time in the future I will come to my senses and I will have wished he had gone . . .
Future Past Progressive: I will have been wishing he had been going . . .
Okay, um, that actually took up an hour or so.
It was a lot of fun.
I know a link on the subjunctive which, I believe, compares it to the conditional.
Going to fetch it now, so we can see how it is really supposed to be laid out.