Passive Voice

S+to be (is, am, are, was, were, be, been, being)
Study this sentence!
Kalimat Aktive (Active Voice)
1. Susanti writes letters every day.
2. Susanti wrote letters yesterday.
3. Susanti is writting letters now.
4. Susanti was writting letters when you come.
5. Susanti will write letters tomorrow.
6. Susanti will be writting letters at 10 tomorrow.
7. Susanti has written letters.
8. Susanti has been writting letters since yesterday.
9. Student can understand the lesson.
10. Student must understand the lesson.
11. Student may understand the lesson.
12. Student has to understand the lesson.
13. The post man has to send the letter.
14. The post man ought to send the letter.

Kalimat Pasif (Pasive Voice)
1. Letters are written by Susanti everyday.
2. Letters were written by Susanti yesterday.
3. Letters are being written by Susanti now.
4. Letters will being written by Susanti.
5. Letters will be written by Susanti tomorrow.
6. Letters will be being written by Susanti tomorrow.
7. Letters have been written by Susanti.
8. Letters have been being written Susanti yesterday.
9. It can be understood by any student.
10. It must be understood by any student.
11. It may be understood any student.
12. It has to be understood by any student.
13. The letters have to be sent.
14. The letters ought to be sent.