Sure! I can help you with that. Let's go through each sentence and correct any mistakes:
1. Son las tijeras de nosotros. Son nuestras tijeras.
Explanation: The possessive pronoun "nuestro(a)" is used to show ownership. In this case, since we're referring to "our scissors," we use the feminine plural form "nuestras."
2. Son los gatos de la Sra. Barbosa. Son sus gatos.
Explanation: The possessive pronoun "su(s)" is used to show ownership. In this case, since we're referring to "her cats," we use the masculine plural form "sus."
3. Es el televisor de Pilar. Es su televisor.
Explanation: Since we're referring to "her television," we use the singular form of the possessive pronoun "su" in this case.
4. Son los libros de nosotras. Son nuestros libros.
Explanation: Just like in the first sentence, we use the masculine plural form of the possessive pronoun "nuestro(a)" to show ownership. In this case, since we're referring to "our books," we use the masculine plural form "nuestros."