This tense means in English
I had played, we had gone

It is exactly the same as the normal past tense. The only difference is the form used to construct it. être and avoir are still used, but in the imperfect indicative. Here is how to form the past participle.

Here are some irregular past participles

Below is a list of all the verbs that use être

When using être in the past tense, the past participle must agree in number and gender with the subject.