Your first revision is fine.
Your second one is incorrect ... unless you mean that your mother's surgery was unable to eat dinner, do homework, or get any sleep!
Do you see why?
Able to think only of my mother's surgery the next morning, I could not even eat my dinner, much less get any sleep, nor could I do my homework.
My Answer
First one is periodic sentence
Unable to eat dinner, do my homework, or get any sleep, I could think only of my mother's surgery the next morning.
Second in cumulative sentence
All I could think about was of my mother's surgery the next morning, unable to eat dinner,do my homework, or get any sleep.
2 answers
Right.
http://grammar.about.com/od/pq/g/periodicsenterm.htm
http://grammar.about.com/od/pq/g/periodicsenterm.htm
1 answer