Chuyển các câu sau sang câu bị động :
1. They repaired my desk during the weekend
2. nobody saw her at the party last night
3. the government has not changed the regulation
4. she didn't introduce me to her mother
5. someone is cutting the grass now
6. someone ought to repair this window
7. Peter is writing a letter to his friend
8. my friends are making some phone call in the evening
9. bad drivers are causing many accidents
10. people play football all over the world
1. They repaired my desk during the weekend
=> My desk was repaired during the weekend
2. nobody saw her at the party last night
=> She wasn't seen at the party last night
3. the government has not changed the regulation
=> The regulation hasn't been changed by the government
4. she didn't introduce me to her mother
=> I wasn't introduced to her mother
5. someone is cutting the grass now
=> The grass is being cut now
6. someone ought to repair this window
=> This window ought to be repaired
7. Peter is writing a letter to his friend
=> A letter is being written to his friend by Peter
8. my friends are making some phone call in the evening
=> Some phone calls are being made by my friends in the evening
9. bad drivers are causing many accidents
=> Many accidents are being caused by bad drivers
10. people play football all over the world
=> Football is played all over the world