The following is from Anthony Trollope's Framley Parsonage (Chapter XV).
1. "'No one has or could depute me. I have come to speak my own mind, not that of any other."
If one were to change the order of 'has' and 'could' in the first sentence above, (I hope) one would get the following.
2. No one could or has deputed me.
I was wondering if the following sentences would be grammatically acceptable in light of the above, possible punctuation-errors notwithstanding.
3. They have never given up nor will ever.
4. I have and will always help them.