que nous ne nous sommes jamais rencontrés auparavant

that we have never met before

→ que
phrase Rare #39,459
that we have never met before Used after a verb such as être sûr or être sûre to express doubt or confirmation about whether two or more people have met previously. The ending of «rencontrés» changes to «rencontrées» when referring exclusively to women.
FR: Je suis certain que nous ne nous sommes jamais rencontrés auparavant.
EN: I’m sure that we have never met before.