关于It is(was)the first time+定从的句子定从的时态到底是用完成时还是时态前后一致??书上是说It is the first / second time…+that…结构中的从句部分,用现在完成时。可是It is the first time that I see you.It was the first time that I saw you这两句怎么解释?还是这个句型的时态有规律的。。帮忙解答一下。。最好是能确定正确的。明天老师要提问~~谢了!!