The word "didn't" is not a pronoun.
The word "didn't" is a contraction, a shortened form of the verb "did" and the adverb "not".
Example:
Ms. Jones did not like the idea.
Ms. Jones didn't like the idea.
A pronoun is a word that takes the place of a noun in a sentence. Example: Ms. Jones didn't like the idea. She said "no". (the pronoun 'she' takes the place of the noun 'Ms. Jones' in the second sentence)
The word "Which" is a pronoun. However, depending on how it is used it in a sentence the word can vary between being an interrogative pronoun or a relative pronoun.
PREPOSITION
The word 'this' is not a noun.The word 'this' is a pronoun, an adjective, and an adverb.Examples:This is mother's favorite movie. (demonstrative pronoun)This movie is mother's favorite. (adjective)I love you this much! (adverb)
Yourself is a pronoun as it replaces your name.
Adjectives ask these questions: which one, what kind, how many, how much, whose.
Interrogative pronoun
'than' is not a pronoun.
The pronoun 'them' is the third person, plural, objective, personal pronoun.
It is not a pronoun it is a common noun.
"Of" is not a pronoun. He, she, it, they, them, are all pronouns. "Of" is a preposition.
The word 'or' is not a pronoun; or is a conjunction, a preposition, or a noun.
Video is not a pronoun, it is a common noun.
It's called a reflexive pronoun.
Whoever is a subjective pronoun.
The pronouns in the sentence are what (an interrogative pronoun) and you (a personal pronoun).
The kind of noun or pronoun that corresponds with myself is a reflexive pronoun. The personal pronoun that would be used in this case is 'I'. In reflexive form you would say 'myself'.
He is the pronoun for brother; it is the pronoun for joke. The word your is an adjective form of the possessive pronoun 'yours'.