他行为怪异，我有点怀疑他是否神智正常。

His behaviour was so strange that I began to doubt his sanity.

《牛津词典》

我有点怀疑她讲的不是真话。

I have a suspicion that she is not telling the truth.

youdao

我有点怀疑，但还是决定再给他一次机会。

I was skeptical, but I decided to give him one more chance.

youdao

But I suspect that that's probably a little bit too quick, because really there are two different ways in which facts could influence our behavior.

但我怀疑也许这有点太快了，因为事实上有两种方式,事实可以影响我们的行为。

耶鲁公开课 - 死亡课程节选

I was kind of skeptical because, you know, you just hear about how bad it is and how sketchy but,

我有点怀疑，因为你知道，总是能听说交通多么不完善，

利用大众交通工具吧 - SpeakingMax英语口语达人