Can we change Verb tense in passive voice.
X killed Y. (Active Voice)
Y Killed by X (Passive Voice)
X died in the earthquake. (Active Voice)
X was killed in the earthquake. (passive Voice)
Can we change verb Died to killed in passive voice.
Also, I passive voice doer is either present or absent but from sentence we come to know that some has done to action.
Was killed in accident.
Was killed in earthquake.
Was killed in landslide.
who is the doer in my above examples.