按要求转换句型。 1. I have already packed the camera.(改为否定句) I _____ _____ the camera _____. 2. We are ready.(改为一般疑问句) _____ you _____? 3. I have locked the window.(改为一般疑问句) _____ you _____ the window? 4. She has cleaned her room.(改为否定句) She _____ _____ her room. 5. What about your brother?(改为同义句) _____ _____ your brother?