--I thought you would come back yesterday.--I would if I ----to attend a meting.

问题描述:

--I thought you would come back yesterday.--I would if I ----to attend a meting.
A .don't have B.will not have C.didn,t have D,wouldn,t have请问哪个对?为什么?

肯定是C ,回答的主句用的一般过去式,从句也应用相应时态,并且是实义动词的过去式.(这里不是过去完成时,过去完成时的标志是have/has+动词过去分词)