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？

熱心網友

D ,我認為這道題考的是虛擬語氣，“我本來想幫她解決問題，但是我當時很忙”只有D用的是虛擬

熱心網友

選D虛擬語氣 其意思是If I were not so busy then , I would have helped her solve the problem.

熱心網友

D,"would have done"結構是wuold表示虛擬語氣的固定搭配。

熱心網友

選擇D項虛擬語氣：我本應該幫她解決問題的，可是我那時候太忙了。