There are two levels of the morphological analysis of words: the level of a morphemic analysis and the level of a derivational, or word- building analysis. The morphemic analysis aims at breaking a word into constituent morphemes, determining their number and types (the Method of Immediate and Ultimate Constituents). According to their segmentability words in English are classified into segmen- table (polymorphic) and non-segmentable (monomorphic root-words). There are three types of segmentability: complete, conditional and defective.
The derivational analysis reveals how the word was constructed. The basic units of the derivative structure of words are a derivational base, a derivational pattern and derivational elements (affixes).
