It's difficult to be certain with patients like her.

He'd been certain with a young man's certainty that no woman could long resist him.

One I'm not certain how far to trust with my wife rather than a lover?

However, the outcome of the campaign became less certain with time.

And yet, who could be certain with these people?

I am not at all certain if it can be accomplished, especially with the Chinese.

The 24-year-old forward was far more certain about his own future with the Nets.

He seldom had to meet a man twice to be certain of his ground with him.

Are there certain occasions that pose greater risk for people with heart disease?

They might be anyway, but it was certain with the blue beasts.