[AFFIRMATIVE] People _________ definitely work from home more in the future.
People will definitely work from home more in the future.
[AFFIRMATIVE] I might go to the party, but I'm not sure yet.
I _______ go to the party, but I'm not sure yet.
[NEGATIVE] I am sure that she ______ be happy to hear that.
I am sure that she won't be happy to hear that.