have doubts about

have (one's) doubts (about someone or something)

To be wary or uncertain of someone or something. I know you really love this neighborhood, but I have my doubts. I do have my doubts about Brian—he just seems untrustworthy to me.
See also: doubt, have, someone
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

have doubts about someone or something

to have questions or suspicions about someone or something. I have doubts about Alice and whether she can do it. We have no doubts about the usefulness of this project.
See also: doubt, have
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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