Abstract: The devoid of expression, mood and motion of Internet words brings the loss of implication, while the evidential adverb can reflect the subjective attitude of the speaker efficiently and some of them that comply with the features of Internet context become more popular The popular evidential adverb can be divided into three parts: probable adverb, certain adverb and real adverb, all of which have some kind of rationality and their grammaticalization origin from the vacancy of syntactic constituent

Key words: Internet slang, buzzword, evidential scope, evidential adverb