I. Turn into the passive voice.
- Active voice : \(_{S_1}\) + don't/ doesn't + V + \(O_2\) + adv ( place ) + adv ( time )
- Passive voice : \(S_2\) + is not / am not/ are not + Vpp + adv ( place ) + [ by + \(O_1\) ] + adv ( time )
1. People don't use that machine every day.
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2. They disigned that style two years ago.
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3. Mr. Pike doesn't collect stamps every summer.
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4. People cleaned the beach one week ago.
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5. Children protect the environment from pollution.
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6. Mai is so tired that she can't sit up.
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7. It's interesting to collect stamps from all over the world.
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8. People reduce traffic jams in the city.
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9. Nobody wear jeans at school.
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10. No one used computers ten years ago.
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