1a entails 1b
Sabrina was fired from her job
Sabrina has been terminated from her job
2a presupposes 2b
2a: Steven stopped going to the gym.
2b: steven once went to the gym
Sentence 2a presupposes sentence 2b in which the presupposition is that Steven had once gone to the gym before he stopped.
The trigger word is “stopped”
3a presupposes 3b
3a. Jase no longer reads and writes novels.
3b. Jase used to read and write novels.
Sentence 3a presupposes sentence 3b in which the presupposition is that Jase wrote and read novels.
The presupposition trigger word is “no longer”

