I always regret not ( )harder when I was young.空处为什么是having studied,而不是studying?

Falls in love with you, I always did not regret什么意思 I always regret not ______ harder when I was young.A.studyingB.having studiedC.to studyD.to have studied I always regret not ( )harder when I was young.空处为什么是having studied,而不是studying? I regret to say it is not always easy to do the right thing.thing为什么不加s? I always in regret ,but so what .RT. 请问,I always in regret but RT.I always in regret but so what是这样的 I always will not I do not regret my decision!Because I love you!. Men Always Regret 歌词 I regret Tonight if I die,I do not regret Tonight if I die,I do not regret it意思是什么? Falling in love with you,I do not regret it. This time,I will not regret it,please cherish me i regret saying that he is not brave enough 我想知道这句话是什么意思I choose not to regret it《I choose not to regret it》《Guardian》《Stem Switz》. 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. happiness is a luxury thing,is life always haveoo much regret,not by not regret是什么意思