按要求改写下列句子。
1. Sandy has long hair in a ponytail. (改为一般疑问句并作肯定回答)
— _____________ Sandy _____________ long hair in a ponytail?
— Yes, _____________ _____________.
2. We went to school on foot yesterday morning. (改为否定句)
We _____________ _____________ to school on foot yesterday morning.
3. She is helping the twins now. (改为一般疑问句并作否定回答)
— _____________ she helping the twins now?
— No, _____________ _____________.
4. John comes from Canada. (对画线部分提问)
Where _____________ John _____________ from?
5. I am going to walk my dog after supper. (对画线部分提问)
What _____________ you _____________ _____________ _____________ after supper?