Change the following sentences into the passive voice.
11. They had wrapped the package carefully before they posted it.
12. Children should treat old men with respect.
13. The computer can do all the accounts.
14. They are going to build a new school.
15. He isn’t going to buy that house.
`11` . The package had been wrapped carefully before it was posted.
`->` Bị động quá khứ hoàn thành : had been Pii và bị động quá khứ đơn : was/were + Pii
`12` . Old men should be treated with respect by children
`->` Bị động should : should/shouldn’t be Pii
`13` . All the accounts can be done by the computer.
`->` Bị động của can : can/can’t be Pii
`14` . A new school is going to be built .
`->` Bị động tương lai gần : is/am/are going to be Pii
`15` . That house isn’t going to be bought by him.
`->` Bị động tương lai gần : is/am/are going to be Pii
11.The package had been wrapped carefully before they posted it
12.Old men should be treated with respect by children
13.All the acccounts can be done by the computer.
14.A new school is going to be built
15. That house isn’t going to be bought