1. ellos / pelirrojo
2. carmen / alto
3. yo / la clase de español
4. película / a las once
5. hoy / viernes
6. nosotras / enojado
7. antonio / médico
8. romeo y julieta / enamorado
9. libros / de ana

1. Ellos son pelirrojos.

2. Carmen es alta.

3. Yo estoy en la clase de español .

4. La película es a las once  .

5. Hoy es viernes.

6. Nosotras estamos enojadas.

7. Antonio es médico.

8. Romeo y Julieta están enamorados.

9. Los libros son de Ana.

Explanation:

The verb "ser" is used to talk about:

* physical appearance or inherent personality traits;

* identity or permanent features (nationality, creed, etc);

* family or personal relationships;

* when or where an event takes place;

* the date, seasons and time;

* passive sentences;

* with adverbs of time;

* with the preposition for: recipient, objective or purpose;

* the price;

* the material, origin or membership of an object + preposition of;

* the profession

The verb "estar" is used to talk about:

* short-term moods or health;

* appearance;

* marital status;

* Location;

* the date or season of the year, (not the time): 1st person plural +  prepositions "a / en";

* modal adverbs;

* states: preposition of + noun;

* the price with the preposition "a";

* way in which something has been produced;

* Verb tense: as an auxiliar.

The adjective is a part of the sentence or word class that complements a noun to qualify it; expresses characteristics or properties attributed to a noun, whether concrete or abstract.