2 Types of morphemes 1.Affix(词缀)：Collective term for bound formatives or word-forming elements that constitute subcategories of word classes.Affixes are classified according to their placement on the stem.2. Types of morphemes 1. Affix（词缀）: Collective term for bound formatives or word-forming elements that constitute subcategories of word classes. Affixes are classified according to their placement on the stem