I had very grave doubt as to her innocence, yes.

For decades, the party even had grave doubts about his politics.

"At the end of the day, I am in grave doubt."

She also knew many people who, over the years, had developed grave doubts about him.

I have grave doubts as to how much money we will save.

To my mind, the health of both is in grave doubt.

There is grave doubt that the men will get off.

I have grave doubts as to whether the theater can continue.

Simply as a proposition this is open to grave doubt.

At this moment in time, I still have grave doubts as to whether that is the case.