“完了”本意是表示某个事件或者话题的结束和完成,但其受语义、语用、认知的影响,演变成为一个消极谓语、连接词,表达说话者对于事件发展结果所持有的消极态度甚至绝望的主观情绪。本文中,笔者用语法化的相关理论解释“完了”消极语义的语法化过程及其形成动因。 “End ” The intention is to indicate the end and completion of an event or topic, but its semantic, pragmatic, cognitive effect, evolved into a negative predicate, conjunctions, expression of the speaker for the outcome of the event held Negative attitude or even subjective despair. In this article, the author uses the theory of grammaticalization to explain the grammaticalization of “negative” semantics and its motivation.