Abstract: The directive speech act is very important in a speech act. Finding its distinctive elements is the most important thing. There are three distinctive elements between directive speech act and non-directive speech act: intention, state and relationship of the speaker and listener. Meanwhile the forms of a directive speech act depend on how to handle the “discourse power”: stressing the speaker’s discourse power, stressing the listener’s discourse power or suspending the discourse power. There are different levels in the illocutionary force of a directive speech act, and the force level is not relevant to whether the directive speech is direct or not. An indirect directive act in a threat form is much stronger than a direct directive act.

Key words: directive speech act, constitutional parameter, constitutional rule