Jawaban:

1. The package was mailed by Bob this morning.

2. Our orders are delivered by Mrs. Catty

3. The cake has been eaten by the children.

4. The letter was written by Linda

5. Some expensive watches are being sold by the jeweller.

6. Our class will be taught by Ms. Bond.

7. Many people are employed by the company.

8. Susan has been hired by the company.

9. My old car was bought by a student.

10. The work will be done by Mr. Adam

Penjelasan:

Dalam membentuk kalimat passive, harus diingat bahwa:

- verb yang dipakai harus verb-3

- Tense kalimat tidak boleh berubah . Simple prsent tetap harus simple present, present continuous harus tetap present continuous, simple future tetap harus simple futurem dst.

- subjek kalimat passive adalah apa yang tadinya adalah objek kalimat aktif. Subjek ini bisa singular, bisa plural, dan itu akan menentukan penggunaan to be/modals (is/am/are/as/were/will dst) sesuai tense nya.

Misalnya soal 5. Subjek kalimat passive nya adalah some expensive watches. Ini adalah bentuk jamak/plural, jadi dalam kalimat passive nya dipakai are. Kenapa bukan were? Karena ini kalimat present continuous tense bukan past continuous.

Soal nomor 7: subjek kalimat passive nya adalah many people, bentuk jamak. Jadi dipakai are. Kenapa bukan were? Karena tense nya adalah simple present, bukan simple past.

Semoga bermanfat