two elements in literary settings

how and when does Shakespeare use a setting in act 1 to introduce or develop the theme of forbidden love?

3 answers

Is this for Romeo and Juliet?
yes
In Scene i, we see a fight between the servants of the Capulet's and the Montague's. In Scene v, Romeo and Juliet kiss, neither knowing who the other is.

http://www.sparknotes.com/shakespeare/romeojuliet/