Sometimes a verb and an adjective can have the same shape. Usually this happens with participles. For example, the present participle "interesting" and the adjective "interesting" look the same. Verbs are different from adjectives, though, because they cannot be modified by "very", "more", or "most". For example, you can say "That is very interesting," so you know interesting is an adjective here. But you cannot say "My teacher is very interesting me in math" because in this sentence "interesting" is a verb. On the other hand, if you cannot change the 'be' verb to 'seem' or 'become', it is probably a verb. 