How do you say opened in french?

It might change depending on the context, but the following is how you conjugate the verb, "to open" in past tense.

I opened = j'ai ouvert

You opened = tu as ouvert

He opened = il a ouvert

She opened = elle a ouvert

We opened = nous avons ouvert

You all opened = vous avez ouvert

The guys opened = ils ont ouvert

The girls opened = elles ont ouvert