Through discussing about conventional triggers and conversational triggers, the thesis proposes that the speaker can manipulate the pragmatic presupposition by using linguistic devices including phonological device, lexical device, and syntactic device, so as to achieve successful communication results. 通过讨论常规诱发语和会话诱发语,提出了说话人可以通过运用语音手段,词汇手段和句子手段等来操控语用预设以达到成功交际。