The exceptions in some situations in politeness principle:
(a) In times of emergency(eg: Watch out! ) (b) When the threat to the hearer’s face is minor or none, as in “ If any further information is needed, don’t hesitate to contact me.” (c) When the speaker has authority over the hearer, as in father to son. (d)When the sperker and the hearer are in intimate relations, as in husband to wife.
Leech’s politeness principle
1, Politeness can be realized by various linguistic devices, which may differ in the degrees of politeness. 2, The degrees of politeness are also dependent on the optionality of the utterance. 3,The degrees of politeness vary in accordance with the indirectness of the utterance.
Implicature (会话含义,言外之意) 会话含义,言外之意 会话含义
Conversational implicatures