His very birth date was uncertain, perhaps even to himself.
Health club consumers, for example, may be uncertain about their level of future commitment to an exercise regimen.
She hesitated, as if to say more, but was uncertain how to phrase it.
The captain frowned, clearly uncertain about the proper response to this question.
He was not going to get into a discussion of a word whose meaning was uncertain to him.
In fact I am uncertain about your references to a number of gods.
This assignment made it clear that her position on the force had gone from uncertain to dangerous and she needed an immediate out.
For a moment he stood there, uncertain whether to bolt back to the shelter of the drive before they could see him.
Which direction Fulvia's life will take remains uncertain to the play's very end.
But strong growth in the future seems uncertain to many economists.