Grammar fix
have my doubts
feel strong doubt
To feel unsure whether something is true, suitable or likely to happen.
expression
How oftenCommon
LevelB2
Used inSpeech & writing
Hear it in context
Notice where the phrase sounds natural.
I have my doubts about whether this old laptop can handle the new software.
My friend wants to open a café, but I have my doubts, because she's never even worked in one.
Fix the pattern
One small grammar move makes it sound right.
Not: I have doubts on his plan.
Say: I have my doubts about his plan.
Use 'doubts about' when naming the thing you are unsure about.
Don't confuse it
Other ways to say it
Say you think something's untrue
How certainSome doubtStrong doubt
have my doubtsYou're here · Signals reservations without completely ruling something out.
I wouldn't bet on itCasually warns that a predicted result seems unlikely.seriously doubtMakes clear that you think something is probably untrue.