In Romeo and Juliet: Which specific lines contain the most dramatic feeling in Act 1?
The most dramatic lines are going to be the most interesting and exciting, and the ones that further the plot of the story. One of the most dramatic lines is from the end of scene 5, when Romeo finds out that the girl he has just fallen in love with, Juliet, is a Capulet from a forbidden feuding family.
Is she a Capulet?(125)
O dear account! my life is my foe's debt. (p. 33)
In addition, when Romeo sees Juliet for the first time, his reaction is also dramatic.
O, she doth teach the torches to burn bright! (p. 31)
Sampson’s line in Act 1 scene 1 is dramatic because it starts the duel, and introduces us to the idea that those affiliated with the two families really will fight anywhere, any time.
Draw, if you be men. Gregory, remember thy swashing
blow. (p. 11)
Lastly, the prologue to Act I contains some of the most dramatic lines, including the famous:
A pair of star-cross'd lovers take their life;
Whose misadventur'd piteous overthrows
Doth, with their death, bury their parents’ strife. (p. 8)
These lines are dramatic because they preview the play’s main conflict for us.