The intentional ambiguity is an active discourse manner in which the speaker or the listener,misunderstands intentionally what the sentence conveys in order to achieve his or her particular communicative purpose subjectively.

This paper divides ambiguity in English into intentional and unintentional ambiguity in terms of practical effect,analyzes systematically their causes,and puts forward avoiding ambiguity in practical comˉmunication and making full use of intentional ambiguity to reach the goal in communication.

This paper divides ambiguity into intentional ambiguity and unintentional ambiguity, gives examples combined with communication teaching and forwards methods to avoid and eliminate ambiguity so as to help students clear obstacles to communication.

The passage talks from the sector of communication,the ambiguity can be divided into intentional ambiguity and unintentional ambiguity,and we give examples combined with teaching activities.