Ответ:

We were not having....

She was not Singing

You were not speaking

George was not sitting

5..were not going

6. Was not crying

7. It was not Getting dark

8.... Were not watching

9. Was not watching

10 Were not taking

Ответ:

1. We were not having lunch in the canteen.

2. She was not singing a lovely song.

3. You were not speaking to your boss.

4. George was not sitting in the armchair by the fireplace.

5. Jane and Margaret were not going to the airport.

6. The baby was not crying.

7. It was not getting dark.

8. We were not waiting for my cousin.

9. The woman was not watching the children on the playground.

10. The tourists were not taking photos in front of the palace.

Как это работает:

После were или was просто поставить not, или поменять их на weren't и wasn't соответственно.

На будущее:

С is все тоже самое, либо is not, либо просто isn't.