萌新初来乍到求大佬求解惑

#include<stdio.h>
int main()
{
    int year;
    for(year=2000;year<=2500;year++)
    {
        if(year%4!=0)
        else if(year%100!=0)
           {   printf("%d是闰年\n",year);
               continue;
           }
             else if(year%400!=0)
                {printf("%d是闰年\n ",year);
                 continue;
                }
    }
    printf("\n");
    return 0;
}
出现这个error C2181: illegal else without matching if怎么解决呢
求大佬帮忙解答谢谢