Originally Posted by Xamonas Chegwe
(In reply to post #12 above)
You are not meant to pronounce 'coughing' wiith the stress on the final syllable - it's a trochaic substitution - the stress falls on 'cough', causing a break in the rhythm, as you suggest, but NOT through an unnatural phrasing of the word. Owen uses several other substitutions, trochaic, spondaic and pyrrhic in this poem.
As an example, in the line, "GAS! Gas! Quick, boys!-- An ecstasy of fumbling," Owen uses spondees in the first 4 syllables which are all stressed; a pyrrhic substitution in '-sy of'; and ends with a female ending in fumbling - the unstressed '-ling' falling off the tongue. All of these are long established poetic forms - Shakespeare, Milton, Tennyson, and any other poet that has ever used iambic pentameter has employed them. They augment the simplicity of 5 regular iambic feet, adding colour and movement.
I quite agree that Owen employs these tricks to brilliant effect in this poem - but I suspect that there is far more going on than you realise, given your last post.
For me though, ultimately, the real beauty of this poem is the way that it sends shivers of horror down my spine and brings tears to my eyes every time I read it and the way that this effect is amplified tenfold whenever I read (or hear it read) aloud. You can analyse why it works till your blue in the face but in the end, Owen's skill lies in far more than technical ability and following rules - it depends on the inbuilt instinct that a true poet has for when to break those rules - that can't be taught.