1. E temos o mesmo em inglês:
May he be happy
He/She ordered that we pay the debt.
It is necessary that this vision be put aside.
Mais comum seria dizer, por exemplo:
The hope is that he is / will be happy.
He/She ordered us to pay / ordered payment of the debt.
It's necessary to put aside this vision.
2. Eu nao tentei conversar com ela. = I didn't try to talk to her.
Eu tentei nao conversar com ela. = I tried not to talk to her. (E, provavelmente menos comum, I tried to not talk to her.)