1.A friend is now repairing the piano in the workshop.

2.They are building a new bridge over the river.3.The postman delivered a newspaper this morning.4.My mother gave me a present yesterday.5.The police have arrested the thief. 6.He was typing a letter 改被动语态

1. The piano is now being repaired by a friend in the workshop.
2. A new bridge is being built over the river
3. A newspaper was delivered this morning
4. I was given a present yesterday
5. The thief has been arrested by the police
6. A letter was being typed by him

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1. the piano is being repaired by a friend in the workshop. 2. a new bridge is being built over the river. 3. a newspaper was delivered by the postman this morning. 4. i was given a present by my mother yesterday. or  a present was given to me by my mother yesterday. 5. the thief has been arrested by the police. 6. a letter was being typed by him.

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