按要求改寫句子。     
洪戰(zhàn)輝背妹妹上學(xué)的故事傳遍大江南北。
1．改為疑問句：                                                                               
2．改為否定句：                                                                                
3．改為雙重否定句：                                                                                       
4．改為反問句：