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★It is obvious who performs the action.
★We do not know or do not need to know who performs the action.
★The action is more important than the person who performs the action.
ORBIS
Volunteer doctors do operations on the plane.
Who do operations on the plane?
Passive voice in the simple present tense
using by+performer
am/is/are(not) + done
Operations are done by volunteer doctors on the plane.
are done
by
ORBIS
How many patients were operated on during his last visit?
Passive voice in the simple past tense
was/were(not) + done
150 patients were operated on during his last visit.
were operated
ORBIS
Who took care of the patients?
Passive voice in the simple past tense
was/were(not) + done
The volunteer doctors and nurses took care of the patients.
The patients were taken care of by the volunteer doctors and nurses.
What…
Who…
Where…
How many…
Oxfam
Complete the conversation using the passive voice.