I need help on my homework. Changing plural to singular and vice versa to make question or sentence correct

Question

nosotras/ser/un/profesor/interesante I changed it to "nosotras/somos/el/professor/interesante"

Juan y Felipe/ser/un/hombre/introvertido I changed it to "Juan y Felipe/son/los/hombres/introvertidos"

¿ser/ustedes/un/estudiante/trabajador? I don't know what to put in this one. No clue.

¿ser/Elena/un/señor/simpáatico? I don't know what to put in this one either.

If anyone can help me I would appreciate it. Thank you.

Answer 1

Read this Adjectives and this Indefinite Articles

You probably know what a noun and an adjective is, what you probably don't know is "what are articles."

El, Los, la, las; Un, una, unos, unas. These are the articles.

Nosotras somos unas profesoras interesantes.

Nosotras means "we," and it is a group of women. (feminine and first person plural) So we must use an indefinite article that agrees in gender and number. It is feminine, and it is plural, so we use "unas." Since we are taking about more than one teacher, we say profesoras. We use oras as the ending if the word is for females and ores if it is for males. Finally we have the adjective interesante. Generally if an adjective ends in e, to make it plural all you must do is add an s.

Just as a note, when using ser and professions, one usually does not use any articles, in this case I'm guessing they have the article "unas" in here because of the adjective "interesantes."

Juan y Felipe son unos hombres introvertidos

Yuan and Felipe are both men. So this is "ellos." (Masculine and third person plural) So we use "son" for third person plural, "unos" for masculine plural, "hombres" for masculine plural, and the adjective "introvertidos" for masculine plural.

¿Son ustedes unos estudiantes trabajadores?

Ustedes is third person plural. We have no basis for gender, so we will use masculine (masculine is the default gender used most of the time)

¿Es Elena una señora simpática? Elena is singular, and I think feminine.

So we just change the indefinite article to feminine again, the noun to feminine, and the adjective to feminine.