* Pronouns need a reference: Pronouns like "he," "she," "it," "they," "we," "you," and "I" refer to nouns or noun phrases that have already been introduced in the sentence or in the context of the conversation.
* Subject-verb agreement: Sentences need a subject (noun or pronoun) and a verb. Pronouns, on their own, can't fulfill both roles.
Examples:
* Incorrect: "They themself." (Missing a verb and a clear reference for "they" and "themself.")
* Correct: "They gave it to themself." (Pronouns "they" and "themself" refer to previously introduced nouns or noun phrases, and the sentence has a verb "gave.")
Let me know if you have any other questions about pronouns!