I ____ her slove the problem ,but I was so busy then.( )A.had helped B.would help C.have helped D.would have helped原因？
热心网友
D ,我认为这道题考的是虚拟语气，“我本来想帮她解决问题，但是我当时很忙”只有D用的是虚拟
热心网友
选D虚拟语气 其意思是If I were not so busy then , I would have helped her solve the problem.
热心网友
D,"would have done"结构是wuold表示虚拟语气的固定搭配。
热心网友
选择D项虚拟语气：我本应该帮她解决问题的，可是我那时候太忙了。