A psychiatrist asked a patient what she had dreamed the previous night. She replied that she had not dreamed at all.

"Madame," he said, "I can't help you if you won't do your homework."
【注释】

psychiatrist  [saiˈkaiətrist] n.精神科医生，精神病专家

previous  [ˈpri:viəs] a. 先，前，以前的