1.They are talking about the weather.

2.The weather was being discussed when I came.

3.This time yesterday  his new book was being discussed in the library.

4.This time yesterday  they discussed his new book in the library.

5.They are building a new schoold near my house.

6.A new school is being built near my house.

7.Yesterday at 5 o'clock they showed us their new school.

8.Yesterday at 5 o'clock their new school was shown to us.

9.I am translating text now.

10.The text is being translated now.