certifique-se que

make sure that

→ certificar
phrase Rare #38,844
make sure that A formal or polite instruction; it is commonly followed by the subjunctive.
PO: Certifique-se que a porta esteja trancada.
EN: Make sure the door is locked.

Certifique-se que as velas não se apaguem.

Make sure the candles don't go out.

— Lady Vingança (2005)

Certifique-se que ele a assine.

Make sure he signs it.

— Ventos da Liberdade (2006)

Certifique-se que saibam que sou eu.

Make sure they know it's me.

— Marty Supreme (2025)

E, por favor, certifique-se que meu pai não descubra.

And please make sure my father doesn’t find out.

— Munna Bhai M.B.B.S. (2003)