I think that
Je crois bien que tu le verras à nouveau.
I think you'll see him again.
Oui, oui, je crois bien que c'est lui.
Yes, yes, I’m pretty sure it’s him.
Je crois bien que le pire est derrière nous.
I truly believe the worst is behind us.
— Le Hobbit : Un voyage inattendu (2012)
Je crois bien que je m'inquiète pour vous.
I think I’m really worried about you.
— Star Trek: The Next Generation - All Good Things... (2014)
I think that's it.
I think so.
Je crois bien que c'était Lars.
I think it was Lars.