Réponse :
Bonjour,
PASSIF =
BE ( au temps de la voix active ) + PARTICIPE PASSÉ + ( by + complément d'agent )
a. The school headmaster punished the students after viewing the CCTV recordings.
Phrase au prétérit ==> "be" au prétérit + participe passé ==>
The students were punished by the school headmaster after viewing the CCTV recordings.
b. With see-through cameras, security guards detect explosives through clothes.
Phrase au présent ==> "be" au présent + participe passé ==>
Explosives are detected through clothes by security guards with see-through cameras.
c. Surveillance devices break into people’s lives.
Phrase au présent ==> "be" au présent + participe passé ==>
People’s lives are broken into by surveillance devices.
d. In some places they have fitted loudspeakers on the cameras to talk to people.
Phrase au présent perfect ==> "be" au présent perfect + participe passé ==>
In some places loudspeakers have been fitted ( by them )on the cameras to talk to people.
e. They issue a message when somebody commits an offence.
Phrase au présent ==> "be" au présent + participe passé ==>
A message is issued ( by them ) when an offence is committed.
In Britain passers-by are spied upon by an increasing number of CCTV cameras. Yet, the efficiency of the system against terrorism hasn’t been proved by statistics . And more and more citizens are worried by the extension of surveillance to other places. They feel that the right to privacy is threatened by the system. Authorities are criticized by Civil rights associations for this extensive use of CCTV cameras.
; )
