1. I suspect, nay, I am certain that he is wrong.

2. I am certain that, in those days, the quality of food was so poor that eating was probably hazardous.

3. I am certain that 21 of the 22 district society presidents in 1991/92 found it to be very valuable.

4. I was certain that any minute he was going to do some crazy thing to get him up on Disturbed for sure.

5. I was certain that all the writers were listening to my conversation and were amused by it.

6. I am certain that you'll succeed.

7. I am certain that our football team will win.

8. I am certain that the Foundation leaders involved in RRFC training are acutely aware of this.

9. I am certain that he will deliver on his promise.

10. I am certain that my move to English football helped me to develop.

11. As we look forward to the games of the xxix olympiad in beijing in 2008(), I am certain that the chinese people and athletes will add to the excellence and excitement of the games.