Where´s the poem? so I can try to help
You can acheive the appropriate writing style for your writing essay by using combination writing, or explanitory writing.
The final line (For oft, when on my couch I lie) uses inverted syntax.
The first three sentences use normal syntax: subject first, then verb.
The final sentence, however, uses inverted syntax and places the object (my couch) before the subject and verb.
