Sentence examples for be doubtful from inspiring English sources

This appears to be doubtful, however.

"He will be doubtful for next Monday".

There is reason to be doubtful, however.

Recent history says we should be doubtful.

Column schedule as usual, but blogging will be doubtful.

Strauss claimed a catch replays showed to be doubtful.

I think we have to be doubtful about that".

"I'd be doubtful the deal gets done as proposed.

If the data are skewed, the results obtained may be doubtful.

In case you are wondering, iDriver is not commercially available, yet (and who knows if it will ever be…doubtful).

It's safe to say that Breslin's editor is unlikely to be doubtful this time.