中山大學 SUN YAT-SEN UNIVERSITY Introduction a Systemic Functional linguistics has al ways stressed the Z dialectic interaction between theory and practice Halliday's vision is to construct an appliable theory that 3 can be helpful to people who are engaging with language in their work O an appliable theory: the emphasis of sfl on social accountabil ity a Martin: neo-Marxist theory that is ideologically committed to social action o It can continue growing as the dialectic of theory and practice ∽cz,zczIntroduction ◼ Systemic Functional Linguistics has always stressed the dialectic interaction between theory and practice. ◼ Halliday’s vision is to construct an appliable theory that can be helpful to people who are engaging with language in their work.  an appliable theory: the emphasis of SFL on social accountability  Martin: neo-Marxist theory that is ideologically committed to social action  It can continue growing as the dialectic of theory and practice