Pathetic Fallacy- mimics the speakers violent desires and creates a threatening atmosphere- "it tore the elm-tops down for spite"
Personification- "Porphyria" is a disease with causes symptoms such as mental disturbances, the personification of this may be suggesting that the speaker be affected by the disease- "Porphyria's lover"
Repetition- emphasises his calm manner, he counts of the step to her murder with a composed manner. It may also be mimicking his breathlessness- "And"
Change in rhyming pattern~ at the start of the sonnet the rhyming pattern is ABBA, but half way through it switches to ABAB indicating when a solution is found
The poem is about the relationship between two people that live very different lives and how it affects the speaker, causing her to reevaluate her lifestyle
Irregular rhyming pattern~ the rhyming scheme constantly switches between ABBA, ABAB and AABB representing the unbalanced relationship- the husband is in control
Nature- the use of natural imagery suggests that parting is natural- "Like a winged seed loosened from its parent stem"
Simile- the child is compared to a satellite suggesting that the parting is slow/gradual yet still hurts- "like a satellite Wrenched from its orbit, go drifting away"
Repetition- away is repeated showing that the parent is still caught up on it, he can't move on like his son has- "drifting away", "eddying away", "walking away"