“Simple Present Tense”

Active   : Once a week, Tom cleans the car.

Passive : Once a week, the car is cleaned by Tom.

http://www.englishpage.com/verbpage/simplepresent.html

“Simple Past Tense”

Active   : Tom repaired the car.

Passive : The car was repaired by Tom.

http://www.englishpage.com/verbpage/simplepast.html

“Future Tense”

Active   : John will finish the work by 5:00 PM.

Passive : The work will be finished by 5:00 PM.

http://www.englishpage.com/verbpage/simplefuture.html

“Present Continuous Tense”

Active   : Right now, Tom is writing the letter.

Passive : Right now, the letter is being written by Tom.

http://www.englishpage.com/verbpage/presentcontinuous.html

“Simple Perfect Tense”

Active   : Many tourists have visited that castle.

Passive : That castle has been visited by many tourists.

http://www.englishpage.com/verbpage/presentperfect.html