grammar of copular verbs

Copular verbs are also called "linking verbs" because they link a subject and its subject complement.

"be" is a copular verb in English.

Here is a simple example: He is a man.

He (subject) is (copula) a man (predicate, subject complement).
He = a man.

So is is a linking verb=copular verb, it's like an auxiliary verb then, right? can other verb be a copular verb too?
ex : He seem the man that I have met before. does the verb seem is also a copular verb?

Thank you for your explanation.

ly58 it's like an auxiliary verb then, right?

No. A copula is a main verb. An auxiliary verb is not a main verb.
When "be" is used as an auxiliary verb, it is not a copula.

She is standing on a chair. (Is is part of the verb phrase "is standing")

ly58Can another verb be a copular verb too?

Thank you for your help. so according to my understanding that if a main verb goes with an adjective, then it's a copular one, righ

ly58main verb goes with an adjective

Yes, a main verb complemented by an adjective or a noun that applies to the subject (a subject complement) is functioning as a copular verb.

Here is a good article with examples.

http://grammar.about.com/od/c/g/copulat

Thank you for giving me the site of copulas verbs. It's useful and help me to understand it.