What are the adjectives in the sentence When I walk through the garage door?

Answer 1

There are two problems:

1) There are no actual adjectives.

2) It is not a sentence.

The words "when I walk through the garage door" form a restrictive dependent clause that acts as an adverb to modify an independent clause such as "the cat runs away."

The only words acting as adjectives are:

THE - a definite article indicating a specific door

GARAGE - a noun acting as a noun adjunct or attributive noun, indicating which door