It's not quite certain.

I'm not at all certain.

I am not certain about that.

I'm not certain, sir. Several days.

Not until it suits certain people.

The partial exemption arrangement provides for exemptions from certain activities but not from certain knowledge.

In fact, I'm certain California's not enough.

I'm not certain that he needs help.

Well, I'm not quite certain as yet.

The current number of troops is not certain.

I'm afraid not. Nobody ever knows for certain.

Obtained not without certain, shall we say, sacrifice.

But you're not certain. That's what's driving you crazy.

So you're quite certain he's not at the earthworks?

We asked the bees to learn not just to go to a certain color, but to a certain color flower only when it's in a certain pattern.

It's still not certain who's going to win this match.

I have to make certain that you are not armed.

I like to do certain things, not talk about them.

Well, I'm not at all certain, sir, how Siegfried felt.

However certain disciplines may not be available to a particular sex.

There are, however, certain violations which unfortunately are not always penalized.

It is not only certain countries or regions that are concerned.

I'm certain you'll not be disappointed. She is a rare creature...

Mr. Horn, it looks as if you're still not quite certain.

A Government or other authorities cannot should not be able to require a certain decision from a court in a certain case.

But certain other aspects of social network structure are not so obvious.

It is not a clean slate situation there are certain given facts.

We did not prepare teachers to teach certain children of this generation.

If the arrow is not withdrawn... it is certain you will die.

I'm not certain the flowers wouldn't be better in a different jar.

And it's starting to look at not always and not for everything but in certain moments of time, access to certain kinds of goods and service will trump ownership of them.

Now not being a drug company, we could do certain things, we had certain flexibilities, that I respect that a pharmaceutical industry doesn't have.

I believe it did not mean, I accept certain creedal articles of faith.

He was certain that it would not do so, because of political considerations.

Consequently, the number of permanent court actors in 2005 is not yet certain.

6.6.2.6.1 Certain substances shall not be transported in portable tanks with bottom openings.

However, asset control systems in certain missions have not been standardized or coordinated.

I'm sorry, sir. Madame Sebastian wasn't certain you'd be back tonight. Why not?

At a certain definite time, and they're not cutting in on the take.

In future, remember certain rooms in this house are not to be disturbed.

Certain regions, especially in Africa will not be able to help themselves if initial aid is not provided.

Messages classified as spam are not marked as read. Spam messages are not moved into a certain folder.

You are not guilty because you belong to a certain race, but you are guilty if you pursue people because they belong to a certain race.

Not that there aren't side effects, but I know for certain it will work.

Now, of course there is a certain degree of ethnic allegiance, but not entirely.