anybody.anyone.anything 是指任何人,任何事,第三人称单数
everybody.everyone.everything.指每个人,每件事,第三人称单数
somebody.someone.something指某个人,某件事,第三人称单数
全用does
anybody.anyone.anything 通常出现在疑问句中everybody.everyone.everything是anybody.anyone.anything 的肯定句形式