Final answer:
The subject pronoun implied based on the form of ser that is used can be determined by looking at the conjugation of the verb.
Step-by-step explanation:
The subject pronoun implied based on the form of ser that is used can be determined by looking at the conjugation of the verb. In the sentence 'Eres un estudiante trabajador,' the form 'eres' indicates the subject pronoun 'tú.'
In the sentence 'Somos chicas pelirrojas,' the form 'somos' indicates the subject pronoun 'nosotras.'
In the sentence 'Es un amigo bueno,' the form 'es' indicates the subject pronoun 'él.'
In the sentence 'Sois desordenados,' the form 'sois' indicates the subject pronoun 'vosotros.'
Learn more about subject pronouns in Spanish