In Lexical Phonology English affixes are divided into two sets, class I affixes and class II affixes, and class I affixes cannot be attached to words containing class II affixes. Class I affixes are attached to roots at stratum 1 and class II affixes are attached to words at stratum 2.
This paper discusses that there are many counterexamples to the Affix Ordering Generalization which involves the attachment of class I affixes to words containing class II affixes, and concludes that English affixes are not level ordered in many cases and there are restrictions on English affixiation.