it's high time that he(did)something instead of just talking为森么不是do
问题描述：
it's high time that he(did)something instead of just talking为森么不是do
答
it's high time that he(did)something instead of just talking为森么不是do？
因为it's high time that 从句属于一种【虚拟语气】，that从句的时态要用过去时。意思是：该是做某事的时间了。
又如：
it's high time that we went to school.
该是我们上学的时间了。
答
it's high time是“早该...”的意思，全句意思是：他早该做点别的事，而不应该只是说话。
既然是“早该”做的事，当然用过去时
答
it's high time that＋did或it's high time that＋should do这两种句型