Been x was x were: Como utilizar?

Pessoal,

1. Been: presente e passado perfeito - present and past perfect - usado com [I, you, he, she, it, we, you, they]

a. I have been here for six hours. [Eu estou aqui há seis horas.]
b. You have been working there for two years. [Você está trabalhado lá há dois anos.]
c. How long have you been dating?[Há quanto tempo você está namorando?]
d. I had been trying do find it for days when they called me. [Eu tinha tentado achar isto há dias quando eles me ligaram.]


2. Was: passado simples - to be - simple past - usado com [I, he, she, it]

a. I was at home yesterday. [Eu estava em casa ontem.]
b. He wasn't there. [Ele não estava lá.]
c. Was Bin Laden worse than Hitler? [O Bin Laden foi pior do que o Hittler?]


3. Were: passado simples - to be - simple past - usado com [you, we, they]

a. You were with them. [Você estava com eles.]
b. Where were you born?[Onde você nasceu?]
c. They were here. [Eles estavam aqui.]
d. You were important to her. [Você era importante para ela.]

Bons estudos!