Yes, we were eating hamburgers.
Were you eating hamburgers?
Answer the question: were you travelling yesterday? (Negative).
No, I wasn't. or No, I was not.
Answer the question: was the cat drinking water? (Negative).
No, it wasn't or No, I was not.
Sam and Andrew were studying this morning.
What were Sam and Andrew doing this morning?
She was studying for the quiz on Monday.
What was she doing on Monday?
Yes, my mum was cooking pizza yesterday.
Was your mum cooking pizza yesterday?
He was dancing last weekend.
What was he doing last weekend?
Create the question for the answer: I was reading a book yesterday.
What were you doing yesterday?