1. Verb:
* Base form: exhaust (e.g., "I will exhaust my resources.")
* Past tense: exhausted (e.g., "I exhausted myself with work.")
* Past participle: exhausted (e.g., "I am exhausted from the trip.")
* Present participle: exhausting (e.g., "This project is exhausting.")
2. Noun:
* The word "exhaust" can be a noun meaning "waste gases from an engine" or "a state of extreme tiredness." In this case, it's a common noun and follows general noun rules. (e.g., "The car's exhaust fumes were smelly.")
3. Adjective:
* The word "exhaust" can be an adjective meaning "very tired" or "completely used up." This form is less common. (e.g., "The exhaust well is full of water.")
It's important to consider the context of the sentence to determine which rule applies.
For example:
* "I exhaust myself with work." (verb, present tense)
* "The car's exhaust fumes were smelly." (noun)
* "The exhaust well is full of water." (adjective)