Final answer:
The verb 'ser' is used for identity, nationality, occupation, characteristics, and origin. It takes different forms based on the subject. The subject determines whether to use 'es', 'soy', 'eres', or 'son'.
Step-by-step explanation:
The verb 'ser' is used to indicate identity, nationality, occupation, characteristics, and origin. Let's look at each sentence:
- Ricardo es de México.
- Yo soy una chica fantástica.
- ¿De qué nacionalidad eres tú?
- Los cursos son interesantes.
- Nosotros somos amigos.
In these sentences, 'es' is used with the third person singular pronouns (Ricardo) and (una chica), 'soy' is used with the first person singular pronoun (yo), 'eres' is used with the second person singular pronoun (tú), and 'son' is used with the third person plural pronoun (los cursos) and (nosotros).
Learn more about Use of the verb 'ser' in Spanish