"The clouds are really beautiful!"
Translation:구름이 정말 아름답네!
If ~네 ending is used it is probably an exclamation.
Used to someone you feel comfortable (such as yourself, your friends or someone younger) only
~네 ending is ofeten used in songs, poems and other pieces of literature
Polite form: 구름이 정말 아름답네요! (an exclamation when used to people older or more senior, other than yourself.)