如果你对某件事情 “have second thoughts”，就表示你 “不确定之前的想法是否正确，或经过重新考虑而改变主意”。注意，它和 “on second thoughts” 的意思有点不一样，后者一般用来表示你想更改刚刚做出的决定，并引出新的想法，意思是 “转念一想，再一想”。

More than a third of new hires have admitted that they had second thoughts about their new job during onboarding amid various ...

Do movie critics ever have second thoughts about what they've written? Ever change their minds about movies? If they (alright, let's make that we) do, you're not likely to see it in print.The late ...

I interviewed three of them a second time. I felt that "Fred" was the right person for the job. I talked to Fred at length by phone last weekend and on Tuesday, we sent Fred an offer letter.