"Bye, see you tomorrow!"
Translation:¡Adiós, hasta mañana!
You use the inverted exclamation mark when you are using the normal exclamation mark. You place the inverted exclamation mark on the start of a sentence as a way for readers to understand that the sentence you are writing will be exclaimed. This also applies for the inverted question mark when the sentence you are writing will be asked. Hope this helps! ¡De nada!- You are welcome! ¿Tienes una pregunta?- Do you have a question?