for certain=certainly吗?

for certain=certainly吗? for certain和certainly的区别 sure ,for certain 与certainly的具体区别 为什么是are you certain 不是are you certainly know for certain是什么意思? It is not certainly for me和It is certainly not for me一样或差不多吗 It's certainly not for me.这里面certainly不是副词吗?怎么能修饰be动词呢? for certain reason还是for a certain reason certainly certain certainty 3个单词的意思都差不多..用法区别在哪呢? They are certainly heroes,这句为什么不用certain,不是形容词修饰名词么? It seemed certain that the plane would crash为什么不是certainly呢? smoking will certain do harm to your health.还是用certainly