Usages of quem
A polícia multa quem não respeita as regras de trânsito.
The police fine those who do not respect the traffic rules.
No quiosque vendem jornais, mas também vendem folhetos sobre a cidade para quem a quer conhecer melhor.
At the kiosk they sell newspapers, but they also sell leaflets about the city for those who want to get to know it better.
Elon.io is an online learning platform
We have an entire course teaching Portuguese grammar and vocabulary.