I felt no regret for it.对这件事我不觉得后悔.在这里“regret”是名词?

I felt no regret for it.对这件事我不觉得后悔.在这里“regret”是名词? I have no regret about... I love you for ever ,never regret. I regret No regret cause I've got nothing to lose do you regret paying five dollars for the book?no,i _twice as much for itA would gladly have paid B had galdly paid Cgladly paid I miss you I am never regret for loving I miss you I am never regret for loving you 关于regret的词性和用法regret可以做动词和名词一般说regret to do/regret doing我想问的是 be regret for doing sth.例如：I'm not regret for having done it. “no regret”是什么意思 I regret the mistake,waiting for you to forgive 填空 much______(感到遗憾）,I can not finish the work.这里能不能填 regret I felt,应该怎么填? after I read for two hours ,I felt _______(boring) 求一首劲爆英文歌曲,其中高潮部分歌词是No no no no,I will never forget!No no,I will never regret! ..我女朋友跟我说的 I don't want regret for my life.Therefore,no matter how hard and tough it's gonna be,I won't let it go any more,I will hold you tight I regret ____(have)to do this,but I have no choice. I felt ---Do you regret paying two hundred dollars for this bicycle?---No,I woule gladly have paid______ for it.A.so much twice B.twice so much C.as twice much D.twice as much选什么?为什么? Do you regret paying 5,000dollars for the computer?No,I would gladly pay ()for ittwice many,twice as many ,twice as much ,twice so much应该填哪个?求详细的分析,两倍的价钱应该怎么表示,