1. The walls haven't been painted yet(by them)

2. Pictures and posters haven't been hung in the living room (by her)

3. The origin of the universe won't be explained very soon by scientists.

4. That exhibition won't be opened in June.

5. The bridge hadn't been built by May.

6. The windows aren't washed every month (by us)

7 . The world championship wasn't held last year.

8. The church wasn't being restored at that time.