every grammatical structure involves a choice from a describable set of options. Language is thus a meaning potential. Grammarians in SF tradition use system networks to map the available options in a language. In relation to English, for instance, Halliday has described systems such as mood, agency, theme, etc. Halliday

مطلب مرتبط :   منابع پایان نامه ارشد با موضوع ترقوه، لیگامنتها، ۳/۱، گیمبریلی۲۸