Bonjour,
Réponse :
1. Did Ginebra win its game last night?
Yes, she did
No, she didn't
2. Was he happy with his grades?
Yes, he was.
No, he wasn't
3. Were they at the park last Sunday?
Yes, they were.
No, they weren't
4. Did the President sign the bill into law?
Yes, he did.
No, he didn't.
5. Did we perform well in the contest?
Yes, we did.
No, we didn't
6. Did she forget to bring her books?
Yes, she did
No, she didn't
7. Were you the president of your class?
Yes, I was.
No, I wasn't.
Explications :
SHORT ANSWER:
Yes, + pronom + auxiliaire
No, + pronom + auxiaire à la forme négative