Sorry, none of the examples are correct. "To suffer" means to experience pain, agony or distress over a period of time, or at least have an unpleasant experience. Suffering can be mental or physical. They suffered. They underwent suffering. (collocation: to undergo suffering) They suffered from the monopoly. (You still need more context, if this is to make sense.) Suffer can also mean tolerate: "They refused to suffer his incompetence." "To be suffered (to do something)" means to be allowed or permitted: "They were suffered to eat and drink as much as they would." This is an archaic use. http://www.thefreedictionary.com/suffer