I have a sentence which would say
- Had I won this lottery money 10 years before, I would have saved my mother from illness.
- If WhatsApp was invented 30 years before, I would have saved a lot of money in ISD calls.
These are presumed past. I read about Future 2 which builds sentence for presumed future.
To build these kind of sentences which past form should we use? I could not relate Perfekt, Präteritum or Plusquamperfekt.