She was the object of his affection.
His affection for her was reciprocated.
I had such a crush on him, but he didn't quite understand the nature of my affection...
Yes, the noun 'affection' is an abstract noun, a word for an emotion.
put affection into a sentence.
Affection is not an adjective. It is a noun. Affectionate, however, is.
A noun is used as the subject of the object of a sentence or phrase.
The one noun in the sentence is bus.
A pronoun (he, she, it, him, her, we, us, etc.) can substitute for a noun in a sentence.
The word affection, like other words that end with -ion, is a noun. Other examples of nouns that end in -ion are vacation and function.
A noun clause and a noun phrase function as nouns in a sentence. A pronoun is a substitute for a noun.
A pronoun takes the place of a noun in a sentence and a gerund, a verbal noun, can be used for all of the functions of a noun as the subject of a sentence or clause and the object of a verb or a preposition.
Will you object if I sit here?The object of my affection did not know that I was alive.
Affectionate is the adjective form of affection.