Present perfect active: have/has + done passive: have/has been + done exercises related to present perfect passive  Although it's only three in the afternoon, the city _(to plunge) into darkness has been  plunged   During the war, lots of  towers  _(to collapse)                                 HAVE COLLAPSED  Thirty allied soldiers  (to kill)  since the American military operation  began in October     HAVE BEEN KILLED  Many tourists _ that castle (VISIT)  have visited  the students their books? (give)                            Have given  Pedro  (pay *negative)                            Has not been payed           That technique _many times.(try) Has been tried How many answers ?(give) Have you gave? The mail _yet.(negative*deliver) Has not delivered that part of the world ever ?(visit) Has;been visited       The appartment acroos the street by the police twice this week.(visit) Has been visited She _many times not to that anymore.(tell) Has been told I _by a few people who want to bussiness with me.(contact) Have been contacted Will/Going to Passive  You plenty of time to decide.(give)  Will be given  Tonight, the dishes by John.(wash)       will be washed The project _  before the deadline.(complete) will have been completed The work by 5:00 PM.(finish) will be finished       A beautiful dinner _ by Sally tonight (make) is going to be made A new computer _ by Jane.(buy) will be bought The museum _by millions of tourist tomorrow.(visit) is going to be visited       The contract by the boss.(sign) Will be signed A new shopping center _where this farms stands now.(build) Will be built You some interesting new things in class next week.(teach) Will be taught ...exercises related to present perfect passive  Although it's only three in the afternoon, the city _(to plunge) into darkness... The contract by the boss.(sign) Will be signed A new shopping center _where this farms stands now.(build) Will be built You some interesting new things in class next week.(teach) Will