Affirmative
I CAN be happy
I COULD be happy
You DON'T DRINK tea.
You DIDN'T DRINK tea.
Do you drink orange juice?
Did you drink orange juice?
We can't swim
We couldn't swim.
You are happy
You were happy.
You EAT toast for breakfast.
You ATE toast for breakfast.
She CAN'T dance.
She COULDN'T dance.
CAN you sing?
COULD you sing?
They go to the park.
They went to the park.
She IS confused.
She WAS confused.
She DRINKS a glass of milk.
She DRANK a glass of milk.
We DON'T EAT bananas.
We DIDN'T EAT bananas.
Do they go to school?
Did they go to school?
Do you like jumping?
Did you like jumping?
They AREN'T swimming.
They WEREN'T swimming.
We GO shopping.
We WENT shopping.
They DON'T GO to the cinema.
They DIDN'T GO to the cinema.
Does he eat vegetables?
Did he eat vegetables?
Can I fly?
Could I fly?
AM I fat?
WAS I fat?
She HAS a headache.
She HAD a headache.
He DOESN'T HAVE a pencil.
He DIDN'T HAVE a pencil.
Do you have lots of money?
Did you have lots of money?
He doesn't eat peanuts.
He didn't eat peanuts.
You aren't silly.
You weren't silly.