Interpretation of the "Performatives" and the "Illocutionary Acts" ——Taking the sketch lines for examples

Sketch lines,as a kind of utterance,play the role of the performatives and convey different illocutionary acts.In terms of the speech act theory,sketch lines can be regarded as the two forms: the explicit performatives and the implicit performatives,and by which the sketch actors may perform such five sorts of illocutionary acts as declarations,representatives,commissives,directivesand expressives,etc.