... examining requests in letters.a. Different definitions of LetterLetters seem to be one of important and popular communicative means ofpeople. According to Oxford Dictionary, “A letter is a written ... secondly, some definitions and classification ofSentences are attached. Thirdly, Requests, types of requests, requests in letters andtheir rules are mentioned. Letters with some definitions, forms ... requests in letter depend on manyfactors outside the purpose of letter, such as relationship between writer and recipient,culture habit, importance of work, etc. Those lead people to finding out...