Réponse :
Bonjour,
1. King advocated only non-violent actions.
Only non-violent actions were advocated by King.
2. A white extremist assassinated him in Memphis in 1968.
He was assassinated by a white extremist in Memphis in 1968.
3. During the Montgomery boycott, King told black people to show solidarity.
During the Montgomery boycott, black people were told by King to show solidarity.
4. Around the world, millions of people have seen and remembered King's
speeches.
Around the world King's speeches have been seen and remembered by millions of people.
5. We will not judge you by the colour of your skin but by your actions.
We will not be judged by the colour of our skin but ( we will be judged) by our actions
Passif = "be" ( conjugué au temps de la voix active ) + Participe passé