talk to sb：The teacher talked to his students individually.老师找学生们个别谈话.
talk with sb: I wish to talk with you in private.我希望能私下里同你谈话.
talk about sb: She is tired of talking about her children.她厌倦谈论她的子女.
talk to sb about sth：I must talk to him about his rough behaviour.我得好好说说他的粗野行为.
talk with sb about sth: I don't talk with my boss about my private matters.我不和我的老板谈私事.