我们失望了。用英语怎么说？

我们失望了。

We were disappointed.

we

pron. 我们，咱们，笔者，本人，朕，人们；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

disappointed

adj. 失望的，沮丧的，失意的；v. 使（人）失望( disappoint的过去式和过去分词)，使破灭，使落空；

例句
He felt disappointed but he tried to put on a brave face...
他感到很失望，但还竭力强装欢笑。