Hmm, they have pretty different meanings IMO :). 초대하다 refers to "to invite" when (요)청하다 is "to request, to ask for (often used in formal occasions, though)." (요청하다 = 청하다. 요청하다 is more commonly used :)) *초대하다 나의 생일 파티에 친구를 초대했다 =I *invited my friends to my birthday party. *(요)청하다 정부가 도움을 요청했습니다. =The government asked for help. Hope that helps :)!