两种都可以：
1。在疑问句中， who are we？，与 who am I？ Who are you？ Who is he ？ 等一样
2。在宾语从句中，who we are。
Do you know who we are？ 与 Do you know who they are ？ 等一样
He still does know who we are。 与 He still does know who you are 。 等一样
我是谁 跟 他是谁,你是谁一样的,比如:WHO IS HE,IS 就是随第三人单数,WHO ARE YOU ,ARE就是随第二人单复数,然后 就是我是谁了,我随的是AM,就像前面的吧WHO写在前面,然后AM 随后,然后ME也就是我,放到最后面,WHO AM I,就行了,还要多详细.
