mostraríais
-you would show
The word mostraríais is the conditional form of mostrar in the second person plural.
See the full mostrar conjugation

mostrar

Porque pensé que mostraríais algo de humildad.
Because I thought you'd shown some humility.
Want to Learn Spanish?
Spanish learning for everyone. For free.
SpanishDict Premium
Have you tried it yet? Here's what's included:
Cheat sheets
No ads
Learn offline on iOS
Fun phrasebooks
Learn Spanish faster
Support SpanishDict