Identity / Classification
What is it? Who is who?
Significado
A relation that identifies, names, classifies, or equates one participant with another role, class, or label.
Como identificar
Ask whether the sentence says that X is Y or belongs to a class.
Exemplos
doctor|teacher|friend|problem
my brother is a doctor|this is a mistake
She is a doctor.
Visual guide
Identity/class frame: X = Y She = a doctor person = class/role Meaning: X belongs to Y
Same link, different marking: [She] [is] [a doctor] [She] [doctor] zero BE [She] [doctor-CASE] Marking changes; X = Y stays.
Vista por língua
Na tua língua materna
Identity and classification mostly use ser; professions often appear without an indefinite article.
Ela é médica.
She is a doctor.
Na tua língua de aprendizagem
English identity and classification commonly use 'be', often with an article before singular count nouns.
She is a doctor.
is a doctor = classification
Learners may say 'She doctor' or omit the article in 'She is a doctor'.
Same block, different coding
Both languages use this block strongly, but they signal it differently. Focus on form changes, not only meaning.