Identity / Classification
Copular clause
Predicate nominal
Classification
What is it? Who is who?
core
basic
Scene core
含义
A relation that identifies, names, classifies, or equates one participant with another role, class, or label.
如何识别
Ask whether the sentence says that X is Y or belongs to a class.
示例
单词
doctor|teacher|friend|problem
短语
my brother is a doctor|this is a mistake
句子
She is a doctor.
Visual guide
Basic shape
Identity/class frame: X = Y She = a doctor person = class/role Meaning: X belongs to Y
Compare shape
Same link, different marking: [She] [is] [a doctor] [She] [doctor] zero BE [She] [doctor-CASE] Marking changes; X = Y stays.
语言视角
在母语中
Mandarin Chinese (Simplified, standard)
显性程度
strong
重要程度
Identity and classification commonly use 是 shì, while many property descriptions do not use 是.
她是医生。
tā shì yīshēng = she is doctor
在目标语言中
Arabic (Modern Standard)
显性程度
strong
学习难度
Identity and classification are often expressed as nominal sentences without present-tense copula.
أحمدُ طبيب.
Ahmad doctor.
常见易错点
Learners may overuse هو or miss how definiteness changes identity meanings.
Same block, different coding
Both languages use this block strongly, but they signal it differently. Focus on form changes, not only meaning.