Is ride an adjective

Adjectives describe things

You can't say "he = ride".

That would be "he = riding".

"Ride", as an action, is a verb.

Ride is an action verb. An adjective is a word that describes a noun (which is a person, place, thing, or idea). For example, The red car is new. Red and new are adjectives and they describe the car, which is a noun. An example of a verb would be: The girl jumped very high. Jumped is the verb, high is the adverb (a word that describes a verb), and girl is the noun.