is 现在式be动词
was 过去式be动词
been 过去分词
has been
从过去到现在去过发生的一件事
has/have been in 从过去到现在的一段时间
He has been in the meeting all morning.
has/have been to 从过去到现在去过某地 （通常与次数搭配）
He has been to Japan four times.
has/have gone to 表示人正在前往某地，或已在某地（用于第三人称）
He has gone to America.
finger 手指
ring 戒子
earring 耳环
nose ring 鼻环
navel ring 肚脐环
tongue ring 舌环
nipple ring 乳环
been there done that 已经历过
https://youtu.be/ggYwJqY3B5c?si=5ya7P_EN0kukAEnH