Why didn't you tell me about it?I should have helped you.这句话是虚拟语气为什么不用过去完成时提问呢?
问题描述：
Why didn't you tell me about it?I should have helped you.
这句话是虚拟语气为什么不用过去完成时提问呢?
答
did 不是过去式吗？在有些语句中如果有一个过去式，后面跟的动词不需要转为过去式--准确说不可以转为过去式。especially after a helping verb.
答
should have done 只本应该做但没有做的事
答
“你没有告诉我”是一个事实,所以问句不用虚拟语气,用一般过去时就行了.如果非要虚拟,可以这样：
If you had told me about it,I should have helped you.