The subject does not really perform an action, nor does the verb describe a mere state 
of being.If we broaden our definition to say 
that a verb tells us something about some person or thing, it becomes difficult to 
explain the difference between verbs and adjectives.These definitions may cover the recognized situations acceptably, but any 
definition that covers all cases becomes so vague as to be useless for making 
discriminations.The traditional definitions of parts of speech are misleading as they look for semantic 
definitions.The Linguistic View 
Given this confusion over the concept of parts of speech, it's reasonable to 
ask if we can just abandon the concept completely.In fact, the problems with traditional parts of speech 
have prompted some linguists to abandon the term part of speech 
completely.