=>

V/

1. A letter was being written to Peter's friend.

2. Some phone calls were being made by my friends.

3. Many accidents were being caused by bad drivers.

4. That report was being prepared by Alex when I came to see him.

5. Was Mary's mother being helped by her at that time?

6. Customers were being served by waiters and waitresses.

7. Those papers were being signed by presidents at 8 o'clock yesterday.

Bị động QKTD
(+) S was/were being V3/ed (by O)

(-) S wasn't/weren't being V3/ed (by O)

(?) Was/Were S being V3/ed (by O)?

5/

1. The meeting will be held before May Day.

2. Milk will be used to make yoghurt (by her).

3. These exercises will be done tomorrow.

4. My parcel will be posted.

5. Those books won't be kept for reference.

6. The library card will be issued soon.

Bị  động TLĐ

(+) S will be V3/ed (by O)

(-) S won't be V3/ed (by O)

(?) Will S be V3/ed (by O)?