if引导的虚拟语气应该用什么时态?1.if引导的虚拟口气是不是只有两个时态,if+过去式,情态动词过去式+动词现在时 或 if+had+现在分词,情态动词过去式+have+动词分词 这两种句型?2.应该怎么使用他们这两种时态呢?我总分不清什么时候用过去式和什么时候用完成时,例如:if you were at home yesterday,i would come to see him还是 if you had been at home yesterday,i would have come to see him 应该是哪个呢?3.应该怎么分辨if是引导虚拟语气还是引导真实语气啊?

问题描述:

if引导的虚拟语气应该用什么时态?
1.if引导的虚拟口气是不是只有两个时态,if+过去式,情态动词过去式+动词现在时 或 if+had+现在分词,情态动词过去式+have+动词分词 这两种句型?
2.应该怎么使用他们这两种时态呢?我总分不清什么时候用过去式和什么时候用完成时,
例如:if you were at home yesterday,i would come to see him还是 if you had been at home yesterday,i would have come to see him 应该是哪个呢?
3.应该怎么分辨if是引导虚拟语气还是引导真实语气啊?

  虚拟语气就是不可实现的,用来表示说话人的主观愿望或假想,而不表示客观存在的事实
如下两个例句:
  if I were you, I would go there 如果我是你,我就去那里。
  if I had been there, I would have known the result.如果我去过那里,我应该已经知道结果了。
  而真实语气是可实现的,用于叙述真实事件
如下两个例句:
If I had enough money, I would buy a book. 如果我有足够的钱,我将买一本书。
I won’t lend you any money even if I had money.即使我有钱,我也不会借给你。

if的虚拟语气属于倒退时态形式,分为三种情况,你的第一个问题基本总结了整体,精确来说是这样的:(同时回答问题3和2)虚拟语气即事件发生几率很低,几乎为0.因此为了让读者明白说话人究竟是在说想象的事件还是真实的事...