1. If anyone should ask, please don't tell them it was me who told you.
Should anyone ask, please don't tell them it was me who told you.
2. If I had thought about it for longer, I think I would have got the answer right.
Had I thought about it for longer, I think I would have got the answer right.
3. They wouldn't be in this situation now if they had taken my advice.
Had they taken my advice, they wouldn't be in this situation now.
4. If you took the job, I am sure you wouldn't regret it.
Were you to take the job, I am sure you wouldn't regret it. (or Should you take the job...)
5. I'd probably make fewer bad decisions if I analysed the part my emotions played.
Were I to analyse the part my emotions played, I'd probably make fewer bad decisions.
6. I hope you will feel able to call me and ask if you need any help.
Should you need any help, I hope you will feel able to call me.
