The Northern Subject Rule is a grammatical pattern that occurs in Northern English and Scots dialects. Present-tense verbs may take the verbal ‑s suffix, except when they are directly adjacent to one of the personal pronouns I, you, we, or they as their subject. As a result, they sing contrasts with the birds sings; they sing and dances; it's you that sings; I only sings. Various core areas for the rule have been proposed, including Yorkshire and southern Scotland. In several other dialects across England, occasional variations in agreement between subjects and verbs can be found.