Here's why:
* Adverbs modify verbs, adjectives, or other adverbs. They tell us how, when, where, or to what extent something happens.
* In this phrase, "way" modifies the prepositional phrase "through the door" by indicating the direction or manner of movement.
For example, you could say:
* "He went through the door." (Simple statement)
* "He went way through the door." (Emphasizes how far he went)
Let me know if you'd like to explore other parts of speech or phrases!