write sentences so there is one in the question form,one in the affirmative form and one in the negative form for each numbers :
1. ? : did the buss leave while i was talking to a friend?
+ :
- :
2. -: you weren’t sitting in the departure lounge when your plane departed
+ :
- :
3. ? : was he being silly when he fell and hurt his foot?
+:
-:
4. +: the cat was hiding in her luggage when she found it
? :
- :

2. 

? Did the bus leave while I was talking to a friend?

+ the bus left while i was talking to a friend.

- the bus did'nt leave while I was talking to a friend.

3.

- You weren't sitting in the departure lounge when your plane departed.

+ You were sitting in the departure lounge when your plane departed.

? where you sitting in the departure lounge when your plane departed?

4.

? Was he being silly when he fell and hurt his foot?

+ he was silly when he fell and hurt his foot.

- he was'nt silly when he fell and hurt his foot.

Объяснение: