i supposed it is very important to be on time,___ ___?反义疑问句还请大家说下宾语从句反义疑问句怎么改

isn't it
宾语从句的反意疑问句的对应规则：
一、若反意疑问句的陈述部分为I （we） think（believe，suppose，consider）＋that
从句时，问句部分的助动词和主语与that从句内的动词和主语保持一致。
eg.1.I think that he has done his best, hasn't he?
2.We think that English is very useful, isn't it?
二、若反意疑问句的陈述部分为I （we）don't think（believe，suppose，consider）＋that从句时，从句为否定意义，问句部分的助动词和主语仍与that从句保持一致，用肯定形式。
eg.1.I don't think that you can do it, can you?
2.We don't believe that the news is true, is it?
三、反意疑问句的陈述部分为非第一人称主语＋think (believe，suppose，consider)+that从句时，问句部分的助动词和主语与陈述部分的助动词和主语保持一致。
eg.1.They all think that English is very useful, don't they?
2.He didn't think that the news is true, did he?

isn't it?主语为第一人称,主句动词是think,suppose,imagine,believe,expect,的时候,反义疑问句应该针对从句进行相反的提问