Rewrite the sentences

2. I’m sure that Ethan didn’t go to the cinema yesterday.
Ethan ________________________________ gone to the cinema yesterday.
3. Perhaps David didn’t notice you.
David ________________________________ noticed you.
4. It was a bad idea for us to be rude to the policeman!
We _______________________________been rude to the policeman!
5. It wasn’t necessary for me to buy any food yesterday.
I ______________________________any food yesterday.