将下列句子改成一般疑问句和否定句：1.It is a lovely dog.2. She is a good girl.3. He is my father.4.They are Lilys cousins5.We are classmates. 6. I am a doctor. 7.These are some birds. 8. Those are two stars. 9.They are good friends. 10.There are many books on the shelf. 11.There is a boy in the zoo. 12. This is a beautiful park. 13.That is a big map. 14.You are a singer.