话语理解过程是一个语境选择的过程,是认知主体对语境假设不断推理的认知心理过程。话语理解的关键在于听者利用知识草案、心理图式和社会心理表征三种推导机制,以最小的努力寻求语境与话语的最佳关联。CET4语料分析表明,学习者的话语理解能力不仅与语言知识而且与语用推理能力相关。 The process of discourse comprehension is a process of context selection, which is the cognitive psychology process in which the cognitive subject continuously infers the contextual assumptions. The key of discourse understanding is that the listener uses the three derivation mechanisms of knowledge draft, psychological schema and social psychological representation to seek the best relationship between context and discourse with minimal effort. CET4 corpus analysis shows that learners’ ability to understand discourse is not only related to linguistic knowledge but also to pragmatic reasoning ability.