Affirmative, Negative and Interrogative
1. Past simple: Tom had a shower with cold water. Tom didn't shower with cold water.
Did Tom shower with cold water?
2. Past continuous: The man was waiting for the bus to arrive (-ing form)
The man wasn't waiting for the bus to arrive.
was the man waiting for the bus to arrive?
3. Past perfect : I had lost my wallet
I hadn't lost my wallet
Had I lost my wallet?