Смотри, Passive Voice is easy
правда.
Present Simple меняется на am/is/are + гл. в 3-ей форме (т. е. правильные гл с окончанием ed, если не правильные гл. то наизусть надо знать в идеале)
Present Continious меняется на am/is/are + being + гл. в 3 форме
Past Simple меняется на was/were + 3 форма гл.
Present Perf. - have/has been + гл. 3 форме
Past Perf. - had been + гл в 3 форме
Future Simple - will be + гл. в 3 форме
Modals - can be + 3 форма гл
Ответы:
12. Everything was told him by his friend.
13. The nearest way to the theatre was showed Helen.
14. Some good advice are given his patient by he.
15. The news have been told me by Mary.
16. The little boy was looked with the interest.
17. The paper attentively was examined.