Student or Learner
I heard a teacher say there is no way that "future passive tense" sentences exist because it doesn't make sense. If it's right, why?
Darn. We're going to be so late getting to the party that by the time we arrive, the presents will all have been opened.
Of course you can have passive in the future.
They may have meant the future progressive passive - it will be being done - which is very rare but not impossible.