certain的副詞和反義詞

例句：

I'm certainly never going there again.

我肯定不會再去那裡了。

'Certainly not,' he replied emphatically.

“當然不。”他斷然回答道。

Moby certainly has a fine ear for a tune.

莫比對音調的分辨能力一定很強。

Our future looks uncertain.

我們似乎前途渺茫。

Her future is uncertain.

她前途未卜。

They're both uncertain about what to do.

他們兩人都拿不定主意該怎麼辦。