been 的用法我记得是在表示一直持续到现在时用have been,可以只用been表示一直吗?遇到一个句子 It's been nice meeting you 明白意思是见到你很高兴,但加了been是什么意思呢?如何使用呢?

been 的用法我记得是在表示一直持续到现在时用have been,可以只用been表示一直吗?遇到一个句子 It's been nice meeting you 明白意思是见到你很高兴,但加了been是什么意思呢?如何使用呢?
been 的用法
我记得是在表示一直持续到现在时用have been,可以只用been表示一直吗?遇到一个句子 It's been nice meeting you 明白意思是见到你很高兴,但加了been是什么意思呢?如何使用呢?

been 的用法我记得是在表示一直持续到现在时用have been,可以只用been表示一直吗?遇到一个句子 It's been nice meeting you 明白意思是见到你很高兴,但加了been是什么意思呢?如何使用呢?
been
been
[轻读)bIn, bZn; bin; (重读)bin; bi:n]
《be 的过去分词》
不及物动词
1 [have[has]~; 构成现在完成式; → have 1]
a. 迄今一直…
He has ~ a teacher since 1960.
他自 1960 年以来一直担任教师
Where have you ~ all this while?.
这一阵子你在哪儿?
I have ~ downstairs.
我一直都在楼下
b. 迄今曾待 [到,来] 过
I have just come here.
我刚来这里(现在在这里);
(3)(美)的 have gone to?又表示“曾到过…”之意)
Has she ever ~ at [in, to] Hawaii?.
她曾到过夏威夷吗?
I have often ~ to America.
我常去美国
My mother has never ~ here.
我妈不曾到过这里
c. 刚去过[…]回来[to]
I have ~ to the airport to see my friend off.
我刚到机场送一个朋友
d. (英) (已经) 来过,来访过
The postman hasn't ~ yet.
邮差还没来
e.(英) (已经) 结束
The party has already ~.
聚会已经结束
2 [had ~; 构成过去完成式; → have 2]
a. (迄至过去的某时候) 一直…
I had ~ in business until that year.
直到那一年为止,我一直做生意
b. (迄至过去的某时候) 待 [去,来] 过…
I had once ~ in England before that time.
我在那时候之前到过英国一次
c. (过去的某时候) 刚去过[…][to]
I had just ~ to the bank when you called on me.
你来找我的时候,我刚去银行
d. 假如当时… (就好了)
I wish He had been there.
那时候他在就好了
3 [having ~; 表示较主要子句之时态早发生]
a. 因曾经…,经…之后
Having ~ a teacher myself, I know how difficult it is to teach.
因为本身当过教师,我知道教书多么困难
b. 曾经…
I regret having ~ so careless.
我后悔曾经那么不小心
have been and done(口语)
居然…,竟然…
He has been and moved my papers.
他居然动过我的文件
助动词
1 have[has]~+ 过分; 构成现在完成式的被动语态
His goals have ~ reached.
他的目标已达到
2 had ~+过分; 构成过去完成式之被动语态
The door had already ~ closed when he came.
他来的时候门已经关上了
3 [will[shall]have ~ + 过分; 构成未来完成式之被动语态] 将已经被…了
The letter will have ~ mailed by noon.
这封信在中午以前可以寄出去
4 [have[has]~+doing; 构成现在完成进行式,强调继续] 一直在…

你好。不要想太复杂，就是be动词的完成时态形式。