本文和大家分享的口语表达是：have second thoughts。这个口语表达的意思是change your opinion or start to have doubts about it. consider changing a decision you have already made，有了第二个想法，就是要“改变主意，改变想法”的意思。
- - Are you having second thoughts?
- Yes. It has been scorching hot recently everywhere.
- Suit yourself, then.
- - Did you decide not to get married to him?
- Yes, I had second thoughts about our relationship.
- He appears to be having second thoughts about retirement.
- Although I have second thoughts about your plan, I'll accept it for now.
- If I were you, I would have second thoughts about buying this house, and I would consider the one which is only a stone's throw from the city center.