English:Theme-Rheme主位：述位 (Mathesius) Theme is the primary element of a sentence;it is the subject being talked about and is known. Rheme is the core element of a sentence;it is something the speaker wants to say about the theme,or something related to the theme.English: Theme-Rheme主位:述位 (Mathesius) ◼ Theme is the primary element of a sentence; it is the subject being talked about and is known. ◼ Rheme is the core element of a sentence; it is something the speaker wants to say about the theme, or something related to the theme