It turns out that there is a mistake in the title of the cartoon “There once was a dog”: we say it correctly – Different
“Once upon a time there was a dog” is not correct: we speak Ukrainian correctly
The long-past or pre-past tense is a verb form, the main meaning of which is usually considered to be antecedent in relation to some situation in the past. The past tense adds a special flavor to the Ukrainian language, it is often used in stories, fairy tales, when it is necessary to emphasize that the action took place a long time ago.
The past tense is also used in classical literature and live speech. This form is recommended to be used in colloquial and artistic styles to enhance the conversational flavor, but it is also used in journalistic style and even in official business.
In the phrase “once upon a time there was a dog” the past tense is used, which emphasizes that the story is about ancient times. But it turns out that it is not correct to say so, there is an error in the name of the legendary cartoon,