How [STRIKE]could[/STRIKE] can I say [STRIKE]it[/STRIKE] "I've got to make him leave" in a different way? [STRIKE]otherwise?[/STRIKE]
See above for my corrections to the structure of your question.
I have to make him leave.
I have to force him to leave.
I've got to force him to leave.
Why do you need to change the original anyway?