How do you presume in a sentences?

(the classic jungle introduction) "Dr. Livingstone, I presume?"Many people presume the desert to be lifeless, when it is not.I would never presume to know the motivations of another individual.

"Doctor Livingstone, I presume?"It is arrogance to presume that you know more than anyone else.I would not presume to speak for the entire faculty.Many people mistakenly presume that the asteroids...

Presume to judge the quality of the next generation.

I presumed he was at his friends house.

I presume that you are asking the question of anyone who will answer.A servant would not presume to question the decisions of his employer.