Here's why:
* Adverbs modify verbs, adjectives, or other adverbs. They answer questions like "how?", "when?", "where?", or "to what extent?".
* "Tried" describes a state of being or an action in the past. It doesn't modify another word.
For example:
* "I tried to open the door, but it was locked." Here, "tried" is the past tense of the verb "try" and describes the action.
* "The recipe was tried and tested." Here, "tried" describes the state of the recipe.
If you want to use an adverb related to trying, you could use words like:
* Hard: "I tried hard to open the door."
* Seriously: "I tried seriously to solve the problem."
* Previously: "The recipe had been tried previously."