 Which is correct? Concerned. Concerned. Be Concerned About. Number one. Billy's behavior. His parents. Concerns. Is Concerned. Concerns About. Concerns. Two. His grandson in the hospital. He's Concerned. He's Concerned At. He's Concerned About. He's Concerned About. Three. Brad's mother seems really Concerned. Concerned. Concerned About. Concerned. Four. That's not your... Don't worry about it. Concern. Concerned. Be Concerned. Concerned. Five. Jill that she won't pass the class. Concerns. Concerned. Is Concerned. Is Concerned. To learn more about this topic, see video at link. Or check out our websites for more free English learning resources. eslgoal.com and freeenglishstudy.com