- An adjective in predicate position is called a “predicate adjective”; e.g. the word is good
- An adjective in attributive position is called an “attributive adjective”; e.g. the good word…
An adjective in predicate position will be anarthrous and be the complement of a linking verb. If attributive, then the adjective will be articular. Study chapter 9 in BBG. Note how the adjectives in these examples are articular (and hence in attributive position):
|the good word||ὁ ἀγαθὸς λόγος||τὸν ἀγαθὸν λόγον||ὁ λόγος ὁ ἀγαθός||τὸν λόγον τὸν ἀγαθόν|
Note how the adjective in these examples is anarthrous (and therefore in predicate position)
|ὁ λόγος ἐστὶν ἀγαθός||ὁ λόγος ἀγαθός||ἀγαθὸς ὁ λόγος|
Much more on this is in GGBB p306.
See here or watch these videos for attributive, predicate, and substantival uses of the adjective.