copula
language specialized
/ˈkɒp.jə.lə/
a type of verb, of which the most common is "be", that joins the subject of the verb with a complement
一种动词类型,其中最常见的是"be",它用补语连接动词的主语;系(动)词
In the sentence "You smell nice", "smell" is a copula.
在 You smell nice这句话中,smell 是系动词。
It is formed with the copula to be + infinitive marker + infinite verb.
它由连接词(to be) +(不定式标记)+无限动词构成。