鐵齒的你，英文就說這10句！

我確定＝

I'm sure..

我肯定＝

I'm absolutely positive...

我100%確定＝

I'm a hundred percent certain.. 

我徹底認為＝

I'm utterly convinced..

我和你保證＝
I can assure you that...

我非常肯定＝

I couldn't be more sure of... 

我跟你發誓＝
I'd stake my life on it. 

這是耳熟能詳的事實＝
It's a known fact that..

大家都知道＝
Everybody knows that...

我直截了當地說＝
I can state categorically that...

身邊有很鐵齒的朋友嗎？快把這篇分享給他吧！

原文來自這裡