按要求改写句子
(1)He is very funny. (改写成一般疑问句)
                   
(2)Mr Gao is our Chinese teacher (改写为特殊疑问句/划线提问)
                   
(3)Is he old ? ( 做否定回答)
                   
(4)His name is Liu Guofang（划线提问)