t may also be free or bound. РFirst, free root(自由词根) morphemes are those that can stand by themselves and are the base forms of words, such as bookishРSecond, there are relatively a few bound root (黏着词根)morphemes in English.?Such as :pseudo-РAn affix(词缀) is the collective term for the type of morpheme that can be used only when added to another morpheme (the root or stem), so affix is naturally bound.РAffixes in a language are limited in number, and are generally classified into three subtypes, namely, prefix(前缀), suffix(后缀) and infix(中缀), depending on their position around the root or stem of a word.РInflectional affix(屈折词缀): РAffix that attached to the end of words to indicate grammatical relationships are inflectional affix?Inflectional affixes are mostly suffixesРE.g: cups asked faster