Inflectional morphemes are suffixes that change the grammatical use of a word, but not its meaning. For example, adding "-s" to "book" makes it plural, but it doesn't change the word's meaning.
Examples of inflectional morphemes:
-s: Used to make nouns plural, as in "dogs"
-ed: Used to make verbs past tense, as in "waited"
-ing: Used to make verbs present participle, as in "eating"
-en: Used to make verbs past participle, as in "eaten"
-er: Used to make adjectives comparative, as in "teacher"
-est: Used to make adjectives superlative, as in "smallest"
-'s: Used to make nouns possessive, as in "dog's"
