Jawaban:

1.) Present Passive

1. Emails are received by us everyday.
2. The cats are fed by My mom everyday.

2.) Past Passive

1. The thieves were followed by the police into a building.
2. We were driven by The taxi driver to the airport.
3. John was sent a mysterious letter by someone.
4. The visitors were showed a new house by her.
5. This building was designed by the architect last year.

Penjelasan:

Passive voice of simple present :

formula :

S + Is/Am/Are + V3 + by + Agent.

Passive voice of simple past :

formula :

S + was/were + V3 + by + Agent.

Cara mengubahnya..

Objek dari kalimat aktif, di jadikan subjek di kalimat passive, begitu juga sebaliknya.

misalkan:

Pamanku memperbaiki mobil ayahku.

My uncle repairs my father's car

Menjadi:

Mobil ayahku diperbaiki oleh pamanku.

My father's car is repaired by my uncle.