it is the first time 句型用法

it is the first time 句型用法
众所周知,it is the first time that+完成时
但是在有些书上看到了 it is the first time i see u这样的用法
是不是应该改成 i have seen
如果想说 那是我第一次见你 应该说成
it was the first time i saw u还是
it was the first time i had seen