Romance genre conventions
Romance movie conventions.
Normally aimed at female audiences.
Heroes tend to be the men.
main character is usually a bit lonely or unnoticed has something missing.
boy meets girl scenario 
hints through out the film that they are perfect match. 
usually an argument or person in love triangle causes them to separate..
they always get together and have a happy ending. 
story usually involves emotions/pain/love/failure/past/flashbacks.
often starts with a voice over.
main character usually has a funny best friend.
usually parents disapproval on relationships .
a love triangle. 
sad songs to emphasize the sad moments where they have their heart broken and love songs playing in the background when kissing or in the last scene. 
For our trailer me and my friend Eleanor are contemplating whether to  follow a coming of age/romance genre for our trailer so being familiar with the main romance genre conventions will help us create a trailer that can conform or subvert from the stereotypical conventions depending on our decision .