Here's why:
* Grammatical Structure: "At" is a preposition, which usually needs an object following it to complete its meaning. For example: "The cat sat *at the table*." Ending a sentence with "at" leaves the listener/reader hanging, wondering what follows.
* Clarity: Ending with "at" can sometimes be confusing or make the sentence sound incomplete.
Examples:
* Incorrect: "I'm looking forward to the party, at."
* Correct: "I'm looking forward to the party."
Exceptions:
While ending a sentence with "at" is generally considered grammatically incorrect, there are a few exceptions:
* Informal speech: In casual conversation, it's more common to hear people end sentences with prepositions, including "at."
* Literary style: Some writers use unconventional grammar for stylistic effect. They may intentionally break grammatical rules to create a specific tone or emphasize a point.
In general, it's best to avoid ending sentences with "at" unless you have a specific reason to do so.