absolutely adv. 绝对地，当然
He was absolutely wrong.
certainly adv. 无疑，确定；当然
Certainly, he is a loser.
surely adv. [正式]必定，无疑
They can surely overcome these difficulties as long as they have enough money.
The public is certainly getting tired of hearing about it.
‘In any case you remained friends.’ — ‘Certainly.’
‘Perhaps it would be better if I withdrew altogether.’ — ‘Certainly not!’
The bombs are almost certainly part of a much bigger conspiracy.
Today’s inflation figure is certainly too high.
Certainly, pets can help children develop friendship skills.
I certainly don’t remember talking to you at all.