Recall, first, that accentuation has to do, or relates, with the correct writing of words based on the pronunciation of those. In this sense, we already reviewed the rules of the words called esdrújulas and the grave (or plain).
To complete our work, with respect to the type of words according to their pronunciation, we will review what is related to the words acute and the sobresdrújas.
Acute words are those where the highest voice force is made on the last syllable, as, for example, the words canción, universal, papelón, pared.
As you can notice two of the previous words have been placed the tilde while the other two do not carry. The reason, has to do with the rule that says "the acute words will be placed accent spelling (tilde) whenever they end in n, s, or vowel"
They are those types of words where the greatest force of voice falls on the syllable before the third to last syllable as, for example, the words: dí gamelo, e nérgicamente, traémelo, consúltaselo, jú ramelo, eviden**temente.
Note that the last of the words "evidentemente" did not have the tilde, this is due to the following rule:
"The palbras sobresdrújlas is usually placed the tilde, however, in the case of adverbs formed from the adjective + the suffix -mente -, only the tilde will be placed on those cases where the adjective bears the accent by itself.
For example, <ágilmente> is ticked because <ágil> has a tilde. Otherwise it occurs with evidentemente that does not have a tilde because the word evidente does not carry it.
... Until the next smile !!