Adverbs tell how, more specifically, adverbs of manner.
Example:
Martha moved slowly. How did Martha move? Slowly.
The word tell is a verb. It means to narrate something such as a tale.
An adverb.
adjective
preposition
Adjective, It tells when.
As a verb it would be "He lies when he tells the story." As a noun "He tells lies when he talks."
An active verb is required; any other part of speech may be present.
An adverb, an adverb of frequency, because it tells how often you did the verb.
It is a possessive noun. It tells us the plan belongs to God
The word "ending" can function as a noun or an adjective, depending on the context.
Yes. A dictionary tells you the part of speech (e.g. adjective) of each word before giving the definition.
It is an adverb because it tells when the verb occured.