Role responsibility in a text is the responsibility attached to an interactant for the role he or she plays in the text.The study of role responsibility can effectively reduce the negativity in the study of power.In a text,'I' is a marker of role responsibility.The voice,mood,Theme,process types,modality and tense of clauses with 'I' realize respectively the attitude,type,scope,content and degree of role responsibility.Using a corpus of 20 English book reviews on linguistics,this article analyses the lexico-grammatical features of 'I'-clauses i...