The term "The eating of generosity..." is a noun phrase, a group of words based on a noun that functions as a noun in a sentence.
A noun functions as the subject of a sentence or a clause, and as the object of a verb or a preposition.
Examples:
The eating of generosity is the rule that she lives by. (subject of the sentence)
The message that the eating of generosityexpresses is self interest. (subject of the relative clause)
Overindulgence will put an end to the eating of generosity. (object of the preposition 'to')
Like most words, "eating" can be used as different parts of speech. It is a noun when used like this: Eating is fun. It is a verb when used like this: She is eating a hot dog for lunch.
"Have been eating" is the present perfect progressive form of the verb "eat" when the subject of the verb is plural
Eat is a verb.
Why should we have healthy eating
The sentence "ladies are fond of eating" contains a subject ("ladies") that acts as a noun, a linking verb ("are"), an adjective ("fond"), and a prepositional phrase ("of eating") that functions as an adverbial phrase modifying the verb "are."
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.