按要求改写句子。     
1．小嘎子摔了个仰面朝天。     
改为“被”字句：                                                                                          
2．你莫不是还有两个亲人不曾见面？ 
 改为陈述句：                                                                                                  
3．天下有这样标致的人物。  
改为反问句：                                                                                                   
 4．严监生是一个很有钱的人。 
改为双重否定句：