Before revision: According to Ruqaiya Hasan, the metafunctions in SFL "are not hierarchised; they have equal status, and each is manifested in every act of language use: in fact, an important task for grammatics is to describe how the three metafunctions are woven together into the same linguistic unit".
After revision: According to Hasan, the metafunctions in SFL "are not hierarchised; they have equal status, and each is manifested in every act of language use: in fact, an important task for grammatics is to describe how the three metafunctions are woven together into the same linguistic unit".