Don't understand linking verbs or predicate noun or direct object or predicate adjective?

Linking verbs: The easy way to recognize a linking verb is that a linking verb acts as an equals sign:

• the object of the verb is a different form of the subject (Mary is my sister. Mary=sister)
• or the subject becomes the object (Mary's feet got wet. feet->wet).

Direct object: The direct object of a verb is the Word that that receives the action of the verb:

• Mom baked cookies. (cookies are the object that was baked, the direct object of the verb baked)
• John told the story. (the story is what was told, story is the direct object of the verb told)
• Jane had homework. (homework is what she had, homework is the direct object of the verb had)

Indirect object: An indirect object precedes the direct object and tells to whom or for whom the action of the verb is done, who or what is receiving the direct object. There must be a direct object to have an indirect object:

• Mom baked us some cookies. (the cookies were baked for us, the indirect object of the verb baked)
• John told everyone the story. (the story was told to everyone, the indirect object of the verb told)

Predicate: The verb can be referred to as the predicate, but the complete predicate is the verb and all the Words that follow related to that verb.

• Mom baked us some cookies. (the predicate is 'baked us some cookies')
• Mom baked us some cookies but saved some for dad. (there are two predicates, 'baked us some cookies', and 'saved some for dad)
• John told everyone the story and made us laugh. (there are two predicates, 'told everyone the story' and 'made us laugh')

Predicate noun: A predicate noun or pronoun (also called a predicate nominative) is part of the predicate of a sentence rather than being the subject and serves to modify or describe that subject. A predicate noun completes a linking verb and renames the subject.

• Mary is my sister.
• John is a storyteller.

Predicate adjective: A predicate adjective (also called a subject complement) also follows a linking verb and modifies the subject like other descriptive adjectives.

• The cookies are good.
• The stories were funny.
• Mary's feet got wet.
• Jane's homework was difficult.