What are predicative, attributive, object and object complement?

Predicate is an adjective after a copula. For example, I am very happy. Happy is a predicative.

Attribute is an adjective in front of the object or subject, and it is a word ending in "de" in Chinese grammar. For example, I am a handsome boy. "Handsome" is handsome, which is an attribute. The "person" behind is the object. The object is the audience of the action. Object complement is an adjective after the object, which is used to supplement the previous object. For example, I think it's beautiful. Is the object, beautiful is the complement of the object, used to modify the object. Without this adjective, this sentence would be incomplete.

The example I give here is the simplest. Of course, there are special circumstances. I hope it helps you.