The various reasons for choosing the marked theme instead of the unmarked theme in language use are discussed, based on summarizing the study of the marked theme by Mathesius, Quirk, Halliday and Thompson, so as to deepen the previous study.

• 因此在总结马泰休斯、夸克、韩礼德和汤普森对标记主位研究的基础上，探讨分析语言运用中选择标记主位的种种原因，以深化对标记主位的研究。