一道关于虚拟语气的英语题

题目

一道关于虚拟语气的英语题
He felt as if he alone( )what had happened.
A.be responsible to
B.should be responsible for
C.had been responsible
D.were responsible for
C选项后面也是had been responsible for

答案

答案应该选C
因为他感觉好像要单独为已经发生的事负责,关键是“已经发生的事”,是过去；如果是表将来的,as if引导的从句中用 主语+would（might）+动词原形；表示现在的,as if引导的从句中用 主语+过去式