mood particles的用法和样例：
例句
- The mood particle in Mandarin Chinese is a very important kind of mark in the analysis of discourse structure.
现代汉语语气词是现代汉语话语结构一个重要的分析因素。 - Modal particles in the end of the sentence may help expressing different moods with different prosodic features.
句末语气词可以以不同的韵律特征帮助表达不同的语气，具有表达语气的作用。
