What is a linking verb, what is a direct object, and an indirect object

The explanation is as follows

Coupling verbs are also called linking verbs. As a linking verb, it has its own word meaning, but it cannot be used as a predicate alone. It must be followed by a predicative (also called a complement). The system structure describes the status, nature, characteristics, etc. of the subject.

The object is the bearer of the action. For example, English above is the bearer of the verb teach.

Direct object and indirect object refer to when some words can be added with double objects!

For example, give has the sentence patterns give sb. sth. and give sth. to sb.

In this case, sb is the indirect object and sth is the direct object. Abbreviation It is: between two objects directly, the intermediate object comes after, to leads.

Example sentence

I am a student. Here am is the linking verb

I give her a pen. Here her is the direct object and a pen is the indirect object