“She’s here to ask for help, i

“She’s here to ask for help, isn’t she?” he asked.
此句话除了改成：he asked whether she was there to ask for help or not.之外,还可以改成he asked if she was there to ask for help.吗?
另外一句,“Are you sorry for what you have done?” the mother asked the naughty boy.
除了改成：The mother asked the naughty boy if he was sorry for what I had done .
还可以改成：the mother asked the naughty boy whether he was sorry for what I had done or not. 吗?