This sentence belongs to Present Continuous Tense.
Active voice formula: Subject + am/is/are + present participle (verb+ing) + the rest of the sentence
Passive voice formula: Object + is/am/are + being + third form of verb + by + subject
Active voice: The students are decorating the stage for the annual day celebrations
Passive voice: The stage is being decorated by the students for the annual day celebrations
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The given sentence is in Past Continuous Tense and it is in active voice. We need to change it into Passive voice.
Rule :
Subject + (was /were) + being + V3 + Optional Agents.
A letter was being written to her father by Mona.
The sentence is in past continuous tense: was writing.
In passive voice, past continuous becomes was being + past participle → was being written.
This is a sentence of Present Indefinite Tense
Active Voice Formula: Subject + verb + Object
Passive Voice Formula: Object+is/am/are+third form of a verb+by+subject
Rainfall has been reduced in the tropical lands due to deforestation.
Given sentence is in present perfect tense and it is in active voice.
Subject + (has/have) + been + V3 + Other agents
Active Voice: Shall we have completed our task?
Passive Voice: Shall our task have been completed by us.
This sentence belongs to Future tense.
Tense: Present continuous ("are warning")
Passive voice structure: am/is/are + being + past participle
"are warning" → "are being warned"
Correct passive voice: You are being warned by us for the last time.
Hunger means بھوک
This is a sentence of passive voice.
Therefore, "By" should be used.
A car is a wheeled motor vehicle used for transportation.
While changing from active voice to passive voice we make the object as subject and add the subject at last after adding "by".