英语时态问题If I had noticed it.I would have told you .这句话中用了什么时态.为什么要用这些时态.还少打了一个yesterday在you后面.

问题描述:

英语时态问题
If I had noticed it.I would have told you .这句话中用了什么时态.为什么要用这些时态.
还少打了一个yesterday在you后面.

是虚拟语气:
1、表示与现在事实相反的情况:从句:主语+过去时 主句:主语+should/would/could/might+do 2、表示与过去事实相反的情况 从句:主语+had done 主句:主语+should/would/could/might+have done