In the sentence 'She replied that she felt better' yes, felt is a correct form in this sentence.
"Did you have your breakfast" is the better one to use.
The correct statement is "Hope things get better." This is the grammatically correct way to express a wish or desire for improvement in a situation.
he skis better than you
They are exactly the same!
No, more better is not correct. Better is the comparative for the adjective good; best is the superlative and should be used instead of 'more better'.
That is the correct spelling of "straighter" (better aligned).
In the sky is better.
safety is a better word
That is the correct spelling of the word "healthier" (in better health, or better for you).
He should HAVE known better.
Yes, "much better" is correct. It is a common English phrase used to indicate a significant improvement in a situation or condition.