=>
1. has been sent
2. have/been polished
3. Has/been finished
4. hasn't been completed
5. Has/been fed
Ex2/
1. Tom's exercises have already been done.
2. Mary's clothes have been washed.
3. My shoes have been stolen.
4. Has he been brought the message?
5. I haven't been informed about the news.
Bị động HTHT
(+) S have/has been V3/ed (by O)
(-) S have/has not V3/ed (by O)
(?) Have/Has S been V3/ed (by O)?