* Verb: It is the present participle of the verb "to fail," meaning to be unsuccessful or to not meet expectations.
* Example: "He is failing his classes."
* Gerund: It acts as a noun, referring to the act of failing itself.
* Example: "Failing to meet deadlines can have serious consequences."
* Adjective: It describes something as unsuccessful or deficient.
* Example: "The failing business was forced to close."
To determine the specific part of speech, you need to examine its function in the sentence.