What's wrong with: Jsem nejedla od deseti hodin?
'Jsem' has to be the second word.
I realized that as soon as I hit send. Word order is giving me fits.
Just an aside: In such cases you can edit your own posts.
Not to worry... your question got answered, and that will probably be helpful to others.
What's wrong with "Nejím od deseti hodin", Thank you