The document discusses derivational and inflectional morphemes, explaining how derivational morphemes create new words by changing their meaning or grammatical category, while inflectional morphemes modify existing words to fit different grammatical contexts without creating new words. It details various examples of both types of morphemes in English, covering aspects like tense, number, gender, and the formation of new lexemes. The conclusion highlights the key differences between the two types of morphemes in terms of productivity and their impact on the grammatical structure of language.