Yesterday, when Donald Trump held his 9/11 speech, he said something like;
‘If they decide to attack us again, they will never have seen anything like what will happen to them.’
So it is clear from what he said that the future perfect can be a part of the first conditional, but why didn’t he simply say: ‘If they decide to attack us again, they will not know what will happen to them.’
I’m not a Donald Trump fan, I simply watched him on television during the news.
Thanks in advance.