Passive voice

1. 1-present simple

1.1. [ O +is,are +V3 + by + S ]

1.1.1. English is studied by them

2. 2-past simple

2.1. [ O + was,were + V3 +by +s ]

2.1.1. Poems were written by shakespeare

3. 3-present perfect simple

3.1. [ O + has,have +been +V3 +by +s]

3.1.1. The exercises has been explained by the teacher

4. 4-past perfect simple

4.1. [ O + had +been +V3 +by +S]

4.1.1. The rooms had been cleaned by 10:30

5. 5-future will

5.1. [O + will + be + V3 +by +s]

5.1.1. A new sport center will be built in my city

6. 6-model verbs

6.1. [O+ modle verbs + be +V3 by +s]

6.1.1. This secret must not be reverted to any one