按要求写句子
1. This is my brother.(改为一般疑问句,并作肯定回答)
________ _______your brother?
Yes, ________.
2. These are her friends.(改为否定句)
These _______her friends.
3. That is his book.(改为复数句)
_____ _____his________.
4. I am your grandfather.(改为否定句)
I _______your grandfather.
5. Mary is my sister.(改为一般疑问句,并作否定回答)
________ _______your sister?
No,_________ _________.
6. He is my teacher.(对画线部分提问)
_______ ______he?