What is an example of an inflectional affix?

An inflectional affix is a type of morpheme that is added to a word to express grammatical information such as tense, mood, voice, aspect, person, number, gender, and case, without changing the word's class.

In this context, the suffix -ing as in "running" indicates the present participle form of a verb, which shows ongoing action or describes a current state. Likewise, the suffix -er is used to form comparatives (like "faster") or to indicate someone who performs an action (like "teacher"). Both of these examples modify the base word to reflect grammatical relationships, which is the key characteristic of inflectional affixes.

Thus, the inclusion of both -ing and -er as examples correctly represents inflectional forms, making the option including both affixes the right choice.