Act IV, Scene 1:
Alliteration can be found in the phrase spoken by Paris: "slow to slack his haste." The repetition of the -s consonant at the beginning of two words is alliteration.
Imagery can be found in Paris's phrase: "house of tears." The phrase literally refers to Juliet's mourning, but it conjures up the image of a house being flooded with tears.
Personification can be found in Juliet's line: "The tears have got small victory by that." This line personifies Juliet's tears as fighters or warriors winning a victory.
Act V, Scene 3:
A metaphor can be seen in Paris's phrase: "Sweet flower." In this phrase he is making an analogy between Juliet and a flower, calling her a flower.