serious doubts‘There must be serious doubts as to whether he is strong enough to shift the party behind him.’
grave doubtsI wonder and I have grave doubts and reservations, that Charles the Third will have a Portsmouth and a naval base to fortify.
there are doubtsThis implies the rather restricting condition that they all have the same activation energy and there are doubts upon this point being raised in recent research.
have any doubtsSo if you have any doubts at all…use a condom.
have doubtsBut we have doubts.’
doubt about whether
cast doubtsThere is a great natural temptation for new members to cast doubts on the worth of pursuing an existing project and to want to push off in new directions.
raise doubtsInnovative policies during the campaign raise doubts over existing policies, and raise questions over why reforms weren't introduced earlier.
similar doubtsShe was willing to bet Hugh Puddephat had never suffered similar doubts.
have no doubtsOnly God and certain madmen have no doubts.
many doubtsThere was some doubt — there were many doubts — but circumstantially it was strong.
real doubtsThe good leader has his ear to the ground and will know the stage at which real doubts are growing.