be doubtful about something

But he was doubtful about the success of any ferry in the area.

If you are doubtful about your ability to negotiate a move, ask for help.

He was doubtful about the safety of herself and her father.

I was doubtful about his identity but he seemed to place me on sight.

You couldn't have expected it, he had been doubtful about this day from the beginning.

The way she'd been feeling, just a little doubtful about me, she might decide to ask for a cut.

"Then I would have become doubtful about the prosecutor general's office."

I didn't understand why they were still so doubtful about it.

Until then people where very doubtful about the social business idea.

As a result, we are also doubtful about the common fund described in the report.