regret 后加to do 还是 to bedoing 还是have done

regret 后加to do 还是 to bedoing 还是have done regret to do want to do这类动词后加to do的 是动词短语 还是动词不定式短语 deserve后加doing还是to do? subscribe to后加doing还是do never后加doing还是to do enough后加doing还是to do choose后加to do还是doing suggest 后加doing 还是to do due to 后加do还是doing make use of 后加to do 还是doing?这题：your time should have been made use of _the final exam ,but ,to my regret,it was not.A to pass B passing C to have passed D having passed easy 后加 to do 还是 doing 还是 do why not后加do还是doing还是to do? help后加do还是doing 还是to do need some money后加to do 还是do? Would better后加do还是to do keep后加什么?to do 还是 do? do good to有利于后加doing还是do regret to do/doingregret to do通常用于sb regret to tell/say that...regret doing放到句子中通常要变regret为过去式吗?thanks!补充一个问题pretend doing还是pretend to do谢