* Interjection: This is the most common usage, expressing a range of emotions like surprise, relief, or pain.
* Example: "Ah, that feels much better!"
* Adverb: It can modify a verb or adjective, often expressing intensity or emphasis.
* Example: "He was ah, so nervous about the presentation."
* Noun: While less common, "ah" can be used as a noun to refer to a sound of surprise or pain.
* Example: "A sudden ah echoed through the room."
The specific part of speech for "ah" will depend on its context within the sentence.