In ʻŌlelo Hawaiian, there are a class of verbs called stative verbs because they describe the state of something or someone -- what we might categorize in English as an adjective used with is/am/are. When such a verb starts the sentence, think "is black two dogs," "Is sulky the girl," "is kind/tired/sick/pretty the woman." Those are stative verbs.
I think it has to do with the order of the words. I'm still trying to figure this out.
If it starts with an adjective, it's a sentence that uses the verb to be. If it starts with a number, it's not.