1) I am hungry. (Present Simple) I am not hungry. Am I hungry?
2) She was fat 2 years ago. (Past Simple) She wasn't fat 2 years ago. Was she fat 2 years ago?
3) He always brushes (Present Simple) his teeth after meals. He doesn't always brush his teeth after meals. Does he always brush his teeth after meals?
4) She is always late for work. (Present Simple) She isn't always late for work. Is she always late for work?
5) Be quiet! The baby is sleeping. (Present Continuous) The baby isn't sleeping. Is the baby sleeping?
6) We saw (Past Simple) a really good film at the cinema last night. We didn't see a really good film at the cinema last night.Did we see a really good film at the cinema last night?
7) She has just broken a vase. (Present Perfect) She hasn't broken a vase. Has she just broken a vase?
8) At 3 o'clock yesterday he was having lunch in a café. (Past Continuous) At 3 o'clock yesterday he wasn't having lunch in a café. Was he having lunch in a café at 3 o'clock yesterday?
9) Perhaps she will marry him (Future Simple) Will she marry him? She won't marry him.