Question

英语 it is the first time 句型

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 u？
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 u？若是转述句的话，又如何呢？比如it was the first time i saw him还是 it was the first time i had seen him

Answer 1

各种情况都有，不一定非得接完成时。见下：
■郭长经主编《学生英语答疑解难手册》(金盾出版社2004年3月第1版)p814：
问：It is the first time +从句的结构中，从句应该用什么时态？
答：It is the first time +从句的结构中，从句用现在完成时。It was the first time +从句的结构中，从句用过去完成时。没有别的时态。例如：It is the first time that Mr Smoth has visited China. 这是史密斯先生第一次到中国来游览。
It was the first time that Mr Smoth has visited China. 译文同上。
句型中主句it 可以用this，that，序数词first也可根据句意改变其他序数词。例如：This is the third time that Mr Smoth has visited the Summer Palace. 这是史密斯先生第三次游览颐和园。
That was the fourth time that Mr Smoth has visited the Summer Palace. 这是史密斯先生第四次游览长城。
■赵振才编著《初高中英语考点难点详解词典》(黑龙江人民出版社2002年10月第1版) p937：
【问】—Do you know our town at all? —No, it is the first time I ____ here.
A. was B. have been C. came D. am coming (全国高考，92—22)
我选了C，对吗？
【答】This is the first (second, third, …) time这个结构要求后面使用现在完成时，This was the first (second, third, …) time这个结构要求后面使用过去完成时。 例如：… 当主句为将来时(It/This/That will be the first time)时，从句要用将来完成时，但用现在完成时来代替：…

从以上可以看出两书均认为It / This / That + be + the first (second, third, …) time之中只能使用完成时态。然而最近出版的王福祯老师主编的《薄冰英语惯用法词典》(商务印书馆国际有限公司2009年1月北京第1版) p1179却认为：“It is (或was) the first (second, third, fourth, etc.) time + (that) 从句”句型中，从句常用现在完成时或过去完成时，也可以用一般过去时。如果表示动作正在进行，也可用进行时。例如： “You know”, he told the guard, “that’s the first time I ever touched a real flower.”
实际上It / This / That + be + the first (second, third, …) time… 之中除使用完成时态以外，还可以使用其他时态。这一点从著名语言学家Michael Swan所著得Practical English Usage (Third Edition) 中可以得到证实：
Practical English Usage (Third Edition) p586:
Present (simple or progressive) and future tense are both possible with This is the last … and similar structures:
This is the last time I pay / I’m paying for you. (Or This is the last time I’ll pay for you. )
再请看英美语中的真实例证：
1. Lingoes ( http://www.lingoes.cn/) 之“句酷双语例句”：(Agence France-Presse, Busan, South Korea, 23rd) - North Korea's athletes arrived in Busan today for the Asian Games. It is the first time that North Korea athletes attend an international sporting event in South Korea.（法新社南韩釜山二十三日电）北韩选手今天抵达釜山参加亚运，这是北韩首次参加在南韩举办的国际运动比赛。
2. BNC (英国国家语料库http://www.natcorp.ox.ac.uk)和BUY-BNC BRTISH NATIONAL CORPUS (UK,1980s-1993) (Mark Davies, Brigham Young University ) http://corpus.byu.edu/bnc/：
This is the first time we actually feel sympathy for Blanche because she is so upset by the death of her husband.
I think it is the first time he actually worked hard.
This is the first time that the two companies will provide a total supply and maintenance contract for ARAMCO, …
…, it is the first time you realise that there are places like ours that you can go,…
It is the first time I have an internal examination.
But this is the first time that RA members are being so actively encouraged to trespass.
This is the first time that the paintings will be shown as a group outside the Hermitage.
“This is the first time you really see everything,” he told The Art Newspaper.
That is the last time I shall put myself at a loss or disadvantage for her, she decided, unable as she was to thank me.
This is the last time I'll be part of these people.
Barry is ready for his hols so this is the last time we will see the talking sweater in action.
I fear that this is the last time we shall ever see each other.
This was the last time they saw him.
That was the last time we spoke.
It was the last time Endill would believe anything a teacher told him.
It was the last time Kenneth ever saw Rory.
It was the last time we were ever to see him alive.
It was the first time I was able to say it.
It was the first time we made a connection.
That was the first time I was to see pain and suffering at close quarters.
This was the first time that everyone else on the station at that time became aware of the danger,…

Answer 2

在语法规定上来说是 it's the first time that ....have done ／it was the first time that....had done 前后时态对应 但有时须根据语境来判断
it's the first time that i see u。
这话是你第一次看见别人的时候跟别人说的，你不可能第一次见到这个人的时候就已经见过他了。

2It was the first time that I saw you.
这句话意思为：当时是我第一次见到你。同理：你不可能当时第一次见到这个人就已经见过这个人了。 所以有时也可以后跟过去时和现在时。 这是口语交流方面不要老是在语法上想问题 语境语感有时更重要

Answer 3

既然有个you，说明说话的人正和you见着面；要是之前见过，就应该是it is the second time了；要是俩人是第二次以上见面正在回忆第一次，就应该是it was the first time了
既然是现在的第一次，说明现在的见面是第一次而且还没结束，所以不能用完成时

Answer 4

问一下老师嘛！也祝你学会这个题，加油！