按要求写句子。 1. It's my backpack.(改为一般疑问句) __
题型：句型转换
问题：
按要求写句子。
1. It's my backpack.(改为一般疑问句)
_________ _________ _________ backpack?
2. It's a black cat.(改为否定句)
It_________ a black cat.
3. Is this a notebook?(作否定回答)
_________ , it_________ .
4. This is a white ball.(改为同义句)
This ball_________ _________ .
5. This is a black ruler.(对画线部分提问)
_________ _________ ?