1、I am certain that he has left-i saw him go out.
我肯定他已走了——我看見他出去了。

2、I am certain that you'll follow me.
我確信你會跟我來。

3、I am certain that he died in a plane crash.
我肯定他在一次空難中身亡了。

4、I am certain that I posted the letter.
我確信我寄出了那封信。

5、I am certain that our football team will win.
我確信我們的足球隊會贏。

6、I am certain that the champion Mr.X is going to be none other than Kaka.
我很確信這個X先生除了卡卡不會有別人。

7、I am certain that ill luck dogs my steps, that's the fourth fountain pen I've lost in six months.
肯定是霉運纏著我了，這是我六個月來丟失的第四支鋼筆。

8、I am certain that he saw me.
我確信他看見了我。

9、However, I am certain that this part is common to many GM cars with rear drum brakes.
不過，我確信，這部分是很常見的許多通用汽車后輪鼓式制動器。

10、I am certain that it would-almost certain.
我確定事該如此——幾乎是毫無疑問的。