Which words from the following sentence are pronouns?
I offered to help her study for the test, but she was too busy.

"I" and "she" are subject pronouns, and "her" is an object pronoun. "Offered", "help", and "study" are verbs. "To" is an infinitive, "for" is a preposition, "but" is a conjunction, and "was" is a verb of being. "Test" is a noun, "too" is an adverb, and "busy" is an adjective.