Question

What is/are the adjective(s) in the following sentence?: The window is broken, so a lot of cold air is coming in.

Answer 1

Many

Explanation:

When we can identify each and every word a parts of speech, we have almost perfectly understood the grammar, this analysis is important to go further morphology of a sentence whether it is correct or not.

See the sentence, by functioning, broken is an passive verb, true, but is an adjective.
So..an adverb modifies two of adjectives... a (article) and lot, then Cold modifies air.. Broken, a, lot, cold are adjectives here.